21021210021132 has 72 divisors (see below), whose sum is σ = 55163545072272. Its totient is φ = 6999623294400.

The previous prime is 21021210021121. The next prime is 21021210021157. The reversal of 21021210021132 is 23112001212012.

21021210021132 is a `hidden beast` number, since 210 + 2 + 1 + 210 + 0 + 211 + 32 = 666.

It is a super-2 number, since 2×21021210021132² (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 an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 10576719 + ... + 12406022.

It is an arithmetic number, because the mean of its divisors is an integer number (766160348226).

Almost surely, 2^{21021210021132} is an apocalyptic number.

It is an amenable number.

21021210021132 is an abundant number, since it is smaller than the sum of its proper divisors (34142335051140).

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

21021210021132 is a wasteful number, since it uses less digits than its factorization.

21021210021132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22983701 (or 22983687 counting only the distinct ones).

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

Adding to 21021210021132 its reverse (23112001212012), we get a palindrome (44133211233144).

The spelling of 21021210021132 in words is "twenty-one trillion, twenty-one billion, two hundred ten million, twenty-one thousand, one hundred thirty-two".