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23121111110 = 252638791297
BaseRepresentation
bin10101100010001000…
…000010100001000110
32012200100110010210112
4111202020002201012
5334323001023420
614342141353022
71445651126126
oct254210024106
965610403715
1023121111110
11989529aa99
124593268772
1322461b4a46
141194a16c86
15904c848c5
hex562202846

23121111110 has 16 divisors (see below), whose sum is σ = 41776248096. Its totient is φ = 9213278208.

The previous prime is 23121111107. The next prime is 23121111113. The reversal of 23121111110 is 1111112132.

It is an interprime number because it is at equal distance from previous prime (23121111107) and next prime (23121111113).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121111113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4393019 + ... + 4398278.

It is an arithmetic number, because the mean of its divisors is an integer number (2611015506).

Almost surely, 223121111110 is an apocalyptic number.

23121111110 is a deficient number, since it is larger than the sum of its proper divisors (18655136986).

23121111110 is a wasteful number, since it uses less digits than its factorization.

23121111110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8791567.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 23121111110 its reverse (1111112132), we get a palindrome (24232223242).

The spelling of 23121111110 in words is "twenty-three billion, one hundred twenty-one million, one hundred eleven thousand, one hundred ten".

Divisors: 1 2 5 10 263 526 1315 2630 8791297 17582594 43956485 87912970 2312111111 4624222222 11560555555 23121111110