21120102122010 has 16 divisors (see below), whose sum is σ = 50688245092896. Its totient is φ = 5632027232528.

The previous prime is 21120102121957. The next prime is 21120102122017. The reversal of 21120102122010 is 1022120102112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (21120102122017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352001702004 + ... + 352001702063.

It is an arithmetic number, because the mean of its divisors is an integer number (3168015318306).

Almost surely, 2^{21120102122010} is an apocalyptic number.

21120102122010 is an abundant number, since it is smaller than the sum of its proper divisors (29568142970886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21120102122010 is a wasteful number, since it uses less digits than its factorization.

21120102122010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704003404077.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21120102122010 its reverse (1022120102112), we get a palindrome (22142222224122).

The spelling of 21120102122010 in words is "twenty-one trillion, one hundred twenty billion, one hundred two million, one hundred twenty-two thousand, ten".