21202455020212 has 48 divisors (see below), whose sum is σ = 40148206761600. Its totient is φ = 9767271704960.

The previous prime is 21202455020209. The next prime is 21202455020303. The reversal of 21202455020212 is 21202055420212.

It is a super-2 number, since 2×21202455020212² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 8365339 + ... + 10601122.

It is an arithmetic number, because the mean of its divisors is an integer number (836420974200).

Almost surely, 2^{21202455020212} is an apocalyptic number.

It is an amenable number.

21202455020212 is a deficient number, since it is larger than the sum of its proper divisors (18945751741388).

21202455020212 is a wasteful number, since it uses less digits than its factorization.

21202455020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18966936 (or 18966934 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The spelling of 21202455020212 in words is "twenty-one trillion, two hundred two billion, four hundred fifty-five million, twenty thousand, two hundred twelve".