21121302202110 has 160 divisors (see below), whose sum is σ = 64092228156000. Its totient is φ = 4943753015040.

The previous prime is 21121302202109. The next prime is 21121302202111. The reversal of 21121302202110 is 1120220312112.

21121302202110 is a `hidden beast` number, since 21 + 1 + 213 + 0 + 220 + 211 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (21121302202109) and next prime (21121302202111).

It is a super-2 number, since 2×21121302202110² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121302202111) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 40612585 + ... + 41129364.

It is an arithmetic number, because the mean of its divisors is an integer number (400576425975).

Almost surely, 2^{21121302202110} is an apocalyptic number.

21121302202110 is an abundant number, since it is smaller than the sum of its proper divisors (42970925953890).

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

21121302202110 is a wasteful number, since it uses less digits than its factorization.

21121302202110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81742008 (or 81741999 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21121302202110 its reverse (1120220312112), we get a palindrome (22241522514222).

The spelling of 21121302202110 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred two million, two hundred two thousand, one hundred ten".