21121110221102 has 16 divisors (see below), whose sum is σ = 33349600786560. Its totient is φ = 10004592605112.

The previous prime is 21121110221069. The next prime is 21121110221111. The reversal of 21121110221102 is 20112201112112.

It is a super-2 number, since 2×21121110221102² (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, 1292828 + ... + 6626735.

It is an arithmetic number, because the mean of its divisors is an integer number (2084350049160).

Almost surely, 2^{21121110221102} is an apocalyptic number.

21121110221102 is a deficient number, since it is larger than the sum of its proper divisors (12228490565458).

21121110221102 is a wasteful number, since it uses less digits than its factorization.

21121110221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7989767.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21121110221102 its reverse (20112201112112), we get a palindrome (41233311333214).

The spelling of 21121110221102 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, two hundred twenty-one thousand, one hundred two".