213033123121031 has 16 divisors (see below), whose sum is σ = 229059811560960. Its totient is φ = 197489498071680.

The previous prime is 213033123121003. The next prime is 213033123121043. The reversal of 213033123121031 is 130121321330312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213033123121031 is a prime.

It is a super-2 number, since 2×213033123121031² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213033123121331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17788085 + ... + 27248526.

It is an arithmetic number, because the mean of its divisors is an integer number (14316238222560).

Almost surely, 2^{213033123121031} is an apocalyptic number.

213033123121031 is a deficient number, since it is larger than the sum of its proper divisors (16026688439929).

213033123121031 is a wasteful number, since it uses less digits than its factorization.

213033123121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45041974.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 213033123121031 its reverse (130121321330312), we get a palindrome (343154444451343).

The spelling of 213033123121031 in words is "two hundred thirteen trillion, thirty-three billion, one hundred twenty-three million, one hundred twenty-one thousand, thirty-one".