31213001323011 has 32 divisors (see below), whose sum is σ = 42380535133440. Its totient is φ = 20428040707200.

The previous prime is 31213001322961. The next prime is 31213001323033. The reversal of 31213001323011 is 11032310031213.

It is a happy number.

It is not a de Polignac number, because 31213001323011 - 2¹³ = 31213001314819 is a prime.

It is a super-2 number, since 2×31213001323011² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31223001323011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 919608301 + ... + 919642241.

It is an arithmetic number, because the mean of its divisors is an integer number (1324391722920).

Almost surely, 2^{31213001323011} is an apocalyptic number.

31213001323011 is a deficient number, since it is larger than the sum of its proper divisors (11167533810429).

31213001323011 is a wasteful number, since it uses less digits than its factorization.

31213001323011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40947.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 31213001323011 its reverse (11032310031213), we get a palindrome (42245311354224).

The spelling of 31213001323011 in words is "thirty-one trillion, two hundred thirteen billion, one million, three hundred twenty-three thousand, eleven".