21131313212199 has 32 divisors (see below), whose sum is σ = 29845044725760. Its totient is φ = 13253263575552.

The previous prime is 21131313212197. The next prime is 21131313212209. The reversal of 21131313212199 is 99121231313112.

It is not a de Polignac number, because 21131313212199 - 2¹ = 21131313212197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131313212197) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1788812617 + ... + 1788824429.

It is an arithmetic number, because the mean of its divisors is an integer number (932657647680).

Almost surely, 2^{21131313212199} is an apocalyptic number.

21131313212199 is a deficient number, since it is larger than the sum of its proper divisors (8713731513561).

21131313212199 is a wasteful number, since it uses less digits than its factorization.

21131313212199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23679.

The product of its digits is 17496, while the sum is 39.

The spelling of 21131313212199 in words is "twenty-one trillion, one hundred thirty-one billion, three hundred thirteen million, two hundred twelve thousand, one hundred ninety-nine".