21212230332120 has 32 divisors (see below), whose sum is σ = 63636690996720. Its totient is φ = 5656594755200.

The previous prime is 21212230332109. The next prime is 21212230332133. The reversal of 21212230332120 is 2123303221212.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 88384292931 + ... + 88384293170.

Almost surely, 2^{21212230332120} is an apocalyptic number.

21212230332120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21212230332120 is an abundant number, since it is smaller than the sum of its proper divisors (42424460664600).

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

21212230332120 is a wasteful number, since it uses less digits than its factorization.

21212230332120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176768586115 (or 176768586111 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21212230332120 its reverse (2123303221212), we get a palindrome (23335533553332).

The spelling of 21212230332120 in words is "twenty-one trillion, two hundred twelve billion, two hundred thirty million, three hundred thirty-two thousand, one hundred twenty".