21213110333012 has 24 divisors (see below), whose sum is σ = 39996378006816. Its totient is φ = 9786301266528.

The previous prime is 21213110332987. The next prime is 21213110333053. The reversal of 21213110333012 is 21033301131212.

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, 90820598 + ... + 91053869.

It is an arithmetic number, because the mean of its divisors is an integer number (1666515750284).

Almost surely, 2^{21213110333012} is an apocalyptic number.

It is an amenable number.

21213110333012 is a deficient number, since it is larger than the sum of its proper divisors (18783267673804).

21213110333012 is a wasteful number, since it uses less digits than its factorization.

21213110333012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181876727 (or 181876725 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21213110333012 its reverse (21033301131212), we get a palindrome (42246411464224).

The spelling of 21213110333012 in words is "twenty-one trillion, two hundred thirteen billion, one hundred ten million, three hundred thirty-three thousand, twelve".