203121222131 has 8 divisors (see below), whose sum is σ = 203726949024. Its totient is φ = 202515667200.

The previous prime is 203121222091. The next prime is 203121222151. The reversal of 203121222131 is 131222121302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203121222131 is a prime.

It is a super-2 number, since 2×203121222131² (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 (203121222151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2555765 + ... + 2634041.

It is an arithmetic number, because the mean of its divisors is an integer number (25465868628).

Almost surely, 2^203121222131 is an apocalyptic number.

203121222131 is a deficient number, since it is larger than the sum of its proper divisors (605726893).

203121222131 is an equidigital number, since it uses as much as digits as its factorization.

203121222131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85981.

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

Adding to 203121222131 its reverse (131222121302), we get a palindrome (334343343433).

The spelling of 203121222131 in words is "two hundred three billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred thirty-one".