212021133131 has 4 divisors (see below), whose sum is σ = 212183852112. Its totient is φ = 211858414152.

The previous prime is 212021133113. The next prime is 212021133157. The reversal of 212021133131 is 131331120212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212021133131 - 2²² = 212016938827 is a prime.

It is a super-2 number, since 2×212021133131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021133101) 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 3 ways as a sum of consecutive naturals, for example, 81357536 + ... + 81360141.

It is an arithmetic number, because the mean of its divisors is an integer number (53045963028).

Almost surely, 2^212021133131 is an apocalyptic number.

212021133131 is a deficient number, since it is larger than the sum of its proper divisors (162718981).

212021133131 is a wasteful number, since it uses less digits than its factorization.

212021133131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162718980.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 212021133131 its reverse (131331120212), we get a palindrome (343352253343).

The spelling of 212021133131 in words is "two hundred twelve billion, twenty-one million, one hundred thirty-three thousand, one hundred thirty-one".