202121132131 has 4 divisors (see below), whose sum is σ = 202526185000. Its totient is φ = 201716079264.

The previous prime is 202121132123. The next prime is 202121132141. The reversal of 202121132131 is 131231121202.

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 202121132131 - 2³ = 202121132123 is a prime.

It is a super-2 number, since 2×202121132131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202121132099 and 202121132108.

It is not an unprimeable number, because it can be changed into a prime (202121132111) 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, 202525686 + ... + 202526683.

It is an arithmetic number, because the mean of its divisors is an integer number (50631546250).

Almost surely, 2^202121132131 is an apocalyptic number.

202121132131 is a deficient number, since it is larger than the sum of its proper divisors (405052869).

202121132131 is an equidigital number, since it uses as much as digits as its factorization.

202121132131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405052868.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 202121132131 its reverse (131231121202), we get a palindrome (333352253333).

The spelling of 202121132131 in words is "two hundred two billion, one hundred twenty-one million, one hundred thirty-two thousand, one hundred thirty-one".