21121111220110 has 16 divisors (see below), whose sum is σ = 41474182032432. Its totient is φ = 7680404080000.

The previous prime is 21121111220093. The next prime is 21121111220147. The reversal of 21121111220110 is 1102211112112.

It is a super-2 number, since 2×21121111220110² (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 7 ways as a sum of consecutive naturals, for example, 96005050891 + ... + 96005051110.

It is an arithmetic number, because the mean of its divisors is an integer number (2592136377027).

Almost surely, 2^{21121111220110} is an apocalyptic number.

21121111220110 is a deficient number, since it is larger than the sum of its proper divisors (20353070812322).

21121111220110 is a wasteful number, since it uses less digits than its factorization.

21121111220110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192010102019.

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

Adding to 21121111220110 its reverse (1102211112112), we get a palindrome (22223322332222).

The spelling of 21121111220110 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred eleven million, two hundred twenty thousand, one hundred ten".