202121133231 has 32 divisors (see below), whose sum is σ = 276183891648. Its totient is φ = 131445227520.

The previous prime is 202121133107. The next prime is 202121133251. The reversal of 202121133231 is 132331121202.

It is not a de Polignac number, because 202121133231 - 2¹⁵ = 202121100463 is a prime.

It is a super-2 number, since 2×202121133231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 202121133198 and 202121133207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121133251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56440861 + ... + 56444441.

It is an arithmetic number, because the mean of its divisors is an integer number (8630746614).

Almost surely, 2^202121133231 is an apocalyptic number.

202121133231 is a deficient number, since it is larger than the sum of its proper divisors (74062758417).

202121133231 is a wasteful number, since it uses less digits than its factorization.

202121133231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6411.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 202121133231 its reverse (132331121202), we get a palindrome (334452254433).

The spelling of 202121133231 in words is "two hundred two billion, one hundred twenty-one million, one hundred thirty-three thousand, two hundred thirty-one".