31322020211209 has 16 divisors (see below), whose sum is σ = 38566369739520. Its totient is φ = 24771849238080.

The previous prime is 31322020211117. The next prime is 31322020211221. The reversal of 31322020211209 is 90211202022313.

It is not a de Polignac number, because 31322020211209 - 2⁷ = 31322020211081 is a prime.

It is a super-2 number, since 2×31322020211209² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31322020212209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72063469 + ... + 72496810.

It is an arithmetic number, because the mean of its divisors is an integer number (2410398108720).

Almost surely, 2^{31322020211209} is an apocalyptic number.

It is an amenable number.

31322020211209 is a deficient number, since it is larger than the sum of its proper divisors (7244349528311).

31322020211209 is a wasteful number, since it uses less digits than its factorization.

31322020211209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144562680.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 31322020211209 in words is "thirty-one trillion, three hundred twenty-two billion, twenty million, two hundred eleven thousand, two hundred nine".