21213220320292 has 48 divisors (see below), whose sum is σ = 49843650552192. Its totient is φ = 7629130183680.

The previous prime is 21213220320277. The next prime is 21213220320337. The reversal of 21213220320292 is 29202302231212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2648999533 + ... + 2649007540.

It is an arithmetic number, because the mean of its divisors is an integer number (1038409386504).

Almost surely, 2^{21213220320292} is an apocalyptic number.

21213220320292 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21213220320292 is an abundant number, since it is smaller than the sum of its proper divisors (28630430231900).

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

21213220320292 is a wasteful number, since it uses less digits than its factorization.

21213220320292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5298007108 (or 5298007106 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

It can be divided in two parts, 21213220 and 320292, that added together give a palindrome (21533512).

The spelling of 21213220320292 in words is "twenty-one trillion, two hundred thirteen billion, two hundred twenty million, three hundred twenty thousand, two hundred ninety-two".