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12102202001 = 99112212111
BaseRepresentation
bin10110100010101100…
…01111001010010001
31011020102102120010202
423101112033022101
5144241130431001
65320520104545
7605622006521
oct132126171221
934212376122
1012102202001
11515041753a
122419005155
1311ab399696
1482b423681
154ac70c96b
hex2d158f291

12102202001 has 4 divisors (see below), whose sum is σ = 12114415104. Its totient is φ = 12089988900.

The previous prime is 12102201931. The next prime is 12102202009. The reversal of 12102202001 is 10020220121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12102202001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12102202009) 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, 6105065 + ... + 6107046.

It is an arithmetic number, because the mean of its divisors is an integer number (3028603776).

Almost surely, 212102202001 is an apocalyptic number.

It is an amenable number.

12102202001 is a deficient number, since it is larger than the sum of its proper divisors (12213103).

12102202001 is an equidigital number, since it uses as much as digits as its factorization.

12102202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12213102.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12102202001 its reverse (10020220121), we get a palindrome (22122422122).

The spelling of 12102202001 in words is "twelve billion, one hundred two million, two hundred two thousand, one".

Divisors: 1 991 12212111 12102202001