21120422400102 has 32 divisors (see below), whose sum is σ = 42261758760960. Its totient is φ = 7036655753600.

The previous prime is 21120422400071. The next prime is 21120422400109. The reversal of 21120422400102 is 20100422402112.

It is a super-2 number, since 2×21120422400102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120422400109) 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, 149440723 + ... + 149581985.

It is an arithmetic number, because the mean of its divisors is an integer number (1320679961280).

Almost surely, 2^{21120422400102} is an apocalyptic number.

21120422400102 is an abundant number, since it is smaller than the sum of its proper divisors (21141336360858).

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

21120422400102 is a wasteful number, since it uses less digits than its factorization.

21120422400102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153428.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21120422400102 its reverse (20100422402112), we get a palindrome (41220844802214).

The spelling of 21120422400102 in words is "twenty-one trillion, one hundred twenty billion, four hundred twenty-two million, four hundred thousand, one hundred two".