21102101233 has 16 divisors (see below), whose sum is σ = 22937190400. Its totient is φ = 19339903440.

The previous prime is 21102101201. The next prime is 21102101269. The reversal of 21102101233 is 33210120112.

It is a cyclic number.

It is not a de Polignac number, because 21102101233 - 2⁵ = 21102101201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102101533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2728510 + ... + 2736232.

It is an arithmetic number, because the mean of its divisors is an integer number (1433574400).

Almost surely, 2^21102101233 is an apocalyptic number.

It is an amenable number.

21102101233 is a deficient number, since it is larger than the sum of its proper divisors (1835089167).

21102101233 is a wasteful number, since it uses less digits than its factorization.

21102101233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12412.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21102101233 its reverse (33210120112), we get a palindrome (54312221345).

The spelling of 21102101233 in words is "twenty-one billion, one hundred two million, one hundred one thousand, two hundred thirty-three".