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101210121 = 333748523
BaseRepresentation
bin1100000100001…
…01100000001001
321001110000012000
412002011200021
5201402210441
614013141213
72336162145
oct602054011
9231400160
10101210121
1152148731
1229a8a809
1317c7855c
14d628225
158d432b6
hex6085809

101210121 has 8 divisors (see below), whose sum is σ = 149940960. Its totient is φ = 67473396.

The previous prime is 101210113. The next prime is 101210147. The reversal of 101210121 is 121012101.

It is a happy number.

101210121 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 101210121 - 23 = 101210113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (101210101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1874235 + ... + 1874288.

It is an arithmetic number, because the mean of its divisors is an integer number (18742620).

Almost surely, 2101210121 is an apocalyptic number.

It is an amenable number.

101210121 is a deficient number, since it is larger than the sum of its proper divisors (48730839).

101210121 is an equidigital number, since it uses as much as digits as its factorization.

101210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3748532 (or 3748526 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 101210121 is about 10060.3241001471. The cubic root of 101210121 is about 466.0236760920.

Adding to 101210121 its reverse (121012101), we get a palindrome (222222222).

The spelling of 101210121 in words is "one hundred one million, two hundred ten thousand, one hundred twenty-one".

Divisors: 1 3 9 27 3748523 11245569 33736707 101210121