202121132231 has 2 divisors, whose sum is σ = 202121132232. Its totient is φ = 202121132230.

The previous prime is 202121132201. The next prime is 202121132243. The reversal of 202121132231 is 132231121202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202121132231 is a prime.

It is a super-2 number, since 2×202121132231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202121132201) 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 as a sum of consecutive naturals, namely, 101060566115 + 101060566116.

It is an arithmetic number, because the mean of its divisors is an integer number (101060566116).

Almost surely, 2^202121132231 is an apocalyptic number.

202121132231 is a deficient number, since it is larger than the sum of its proper divisors (1).

202121132231 is an equidigital number, since it uses as much as digits as its factorization.

202121132231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 202121132231 its reverse (132231121202), we get a palindrome (334352253433).

The spelling of 202121132231 in words is "two hundred two billion, one hundred twenty-one million, one hundred thirty-two thousand, two hundred thirty-one".