21312213120202 has 16 divisors (see below), whose sum is σ = 33919474671360. Its totient is φ = 10008338807488.

The previous prime is 21312213120139. The next prime is 21312213120221. The reversal of 21312213120202 is 20202131221312.

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, 654294568 + ... + 654327139.

It is an arithmetic number, because the mean of its divisors is an integer number (2119967166960).

Almost surely, 2^{21312213120202} is an apocalyptic number.

21312213120202 is a deficient number, since it is larger than the sum of its proper divisors (12607261551158).

21312213120202 is a wasteful number, since it uses less digits than its factorization.

21312213120202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308622205.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21312213120202 its reverse (20202131221312), we get a palindrome (41514344341514).

The spelling of 21312213120202 in words is "twenty-one trillion, three hundred twelve billion, two hundred thirteen million, one hundred twenty thousand, two hundred two".