21010102121120 has 96 divisors (see below), whose sum is σ = 59712921878400. Its totient is φ = 6824333915136.

The previous prime is 21010102121059. The next prime is 21010102121123. The reversal of 21010102121120 is 2112120101012.

It is a super-2 number, since 2×21010102121120² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21010102121095 and 21010102121104.

It is not an unprimeable number, because it can be changed into a prime (21010102121123) 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, 493637135 + ... + 493679694.

It is an arithmetic number, because the mean of its divisors is an integer number (622009602900).

Almost surely, 2^{21010102121120} is an apocalyptic number.

21010102121120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010102121120 is an abundant number, since it is smaller than the sum of its proper divisors (38702819757280).

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

21010102121120 is a wasteful number, since it uses less digits than its factorization.

21010102121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987316870 (or 987316862 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21010102121120 its reverse (2112120101012), we get a palindrome (23122222222132).

The spelling of 21010102121120 in words is "twenty-one trillion, ten billion, one hundred two million, one hundred twenty-one thousand, one hundred twenty".