21202002120212 has 96 divisors (see below), whose sum is σ = 38848993666560. Its totient is φ = 10116352512000.

The previous prime is 21202002120203. The next prime is 21202002120239. The reversal of 21202002120212 is 21202120020212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 754854833 + ... + 754882919.

It is an arithmetic number, because the mean of its divisors is an integer number (404677017360).

Almost surely, 2^{21202002120212} is an apocalyptic number.

It is an amenable number.

21202002120212 is a deficient number, since it is larger than the sum of its proper divisors (17646991546348).

21202002120212 is a wasteful number, since it uses less digits than its factorization.

21202002120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28713 (or 28711 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21202002120212 its reverse (21202120020212), we get a palindrome (42404122140424).

The spelling of 21202002120212 in words is "twenty-one trillion, two hundred two billion, two million, one hundred twenty thousand, two hundred twelve".