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10122001031 = 10219913811
BaseRepresentation
bin10010110110101000…
…10111101010000111
3222010102022221002002
421123110113222013
5131212213013111
64352221335515
7505555406042
oct113324275207
928112287062
1010122001031
11432467320a
121b65a0759b
13c5406512c
146c043dc59
153e395b63b
hex25b517a87

10122001031 has 4 divisors (see below), whose sum is σ = 10131915864. Its totient is φ = 10112086200.

The previous prime is 10122001009. The next prime is 10122001067. The reversal of 10122001031 is 13010022101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13010022101 = 118710960423.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-10122001031 is a prime.

It is a super-2 number, since 2×101220010312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10122001831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4955885 + ... + 4957926.

It is an arithmetic number, because the mean of its divisors is an integer number (2532978966).

Almost surely, 210122001031 is an apocalyptic number.

10122001031 is a deficient number, since it is larger than the sum of its proper divisors (9914833).

10122001031 is an equidigital number, since it uses as much as digits as its factorization.

10122001031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9914832.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 10122001031 its reverse (13010022101), we get a palindrome (23132023132).

The spelling of 10122001031 in words is "ten billion, one hundred twenty-two million, one thousand, thirty-one".

Divisors: 1 1021 9913811 10122001031