21220133210988 has 96 divisors (see below), whose sum is σ = 49886846763264. Its totient is φ = 7020286844928.

The previous prime is 21220133210987. The next prime is 21220133211041. The reversal of 21220133210988 is 88901233102212.

It is a super-2 number, since 2×21220133210988² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21220133210987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1447774156 + ... + 1447788812.

It is an arithmetic number, because the mean of its divisors is an integer number (519654653784).

Almost surely, 2^{21220133210988} is an apocalyptic number.

It is an amenable number.

21220133210988 is an abundant number, since it is smaller than the sum of its proper divisors (28666713552276).

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

21220133210988 is a wasteful number, since it uses less digits than its factorization.

21220133210988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16511 (or 16509 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 21220133210988 in words is "twenty-one trillion, two hundred twenty billion, one hundred thirty-three million, two hundred ten thousand, nine hundred eighty-eight".