21102422120265 has 32 divisors (see below), whose sum is σ = 34934436391680. Its totient is φ = 10864577896704.

The previous prime is 21102422120249. The next prime is 21102422120279. The reversal of 21102422120265 is 56202122420112.

It is not a de Polignac number, because 21102422120265 - 2⁴ = 21102422120249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1947589 + ... + 6782178.

It is an arithmetic number, because the mean of its divisors is an integer number (1091701137240).

Almost surely, 2^{21102422120265} is an apocalyptic number.

It is an amenable number.

21102422120265 is a deficient number, since it is larger than the sum of its proper divisors (13832014271415).

21102422120265 is a wasteful number, since it uses less digits than its factorization.

21102422120265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8735361.

The product of its (nonzero) digits is 7680, while the sum is 30.

Adding to 21102422120265 its reverse (56202122420112), we get a palindrome (77304544540377).

The spelling of 21102422120265 in words is "twenty-one trillion, one hundred two billion, four hundred twenty-two million, one hundred twenty thousand, two hundred sixty-five".