21121152356110 has 64 divisors (see below), whose sum is σ = 42437979950400. Its totient is φ = 7521456310272.

The previous prime is 21121152356099. The next prime is 21121152356137. The reversal of 21121152356110 is 1165325112112.

It is a super-2 number, since 2×21121152356110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 2897745 + ... + 7116124.

It is an arithmetic number, because the mean of its divisors is an integer number (663093436725).

Almost surely, 2^{21121152356110} is an apocalyptic number.

21121152356110 is an abundant number, since it is smaller than the sum of its proper divisors (21316827594290).

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

21121152356110 is a wasteful number, since it uses less digits than its factorization.

21121152356110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10014565.

The product of its (nonzero) digits is 3600, while the sum is 31.

Adding to 21121152356110 its reverse (1165325112112), we get a palindrome (22286477468222).

The spelling of 21121152356110 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred fifty-two million, three hundred fifty-six thousand, one hundred ten".