212021020131 has 4 divisors (see below), whose sum is σ = 282694693512. Its totient is φ = 141347346752.

The previous prime is 212021020093. The next prime is 212021020147. The reversal of 212021020131 is 131020120212.

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 212021020131 - 2⁶ = 212021020067 is a prime.

It is a super-2 number, since 2×212021020131² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212021020131.

It is not an unprimeable number, because it can be changed into a prime (212021020181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35336836686 + ... + 35336836691.

It is an arithmetic number, because the mean of its divisors is an integer number (70673673378).

Almost surely, 2^212021020131 is an apocalyptic number.

212021020131 is a deficient number, since it is larger than the sum of its proper divisors (70673673381).

212021020131 is an equidigital number, since it uses as much as digits as its factorization.

212021020131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70673673380.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 212021020131 its reverse (131020120212), we get a palindrome (343041140343).

The spelling of 212021020131 in words is "two hundred twelve billion, twenty-one million, twenty thousand, one hundred thirty-one".