203002131013921 has 2 divisors, whose sum is σ = 203002131013922. Its totient is φ = 203002131013920.

The previous prime is 203002131013907. The next prime is 203002131013937. The reversal of 203002131013921 is 129310131200302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202908059376400 + 94071637521 = 14244580^2 + 306711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203002131013921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203002131013921.

It is not a weakly prime, because it can be changed into another prime (203002131013901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101501065506960 + 101501065506961.

It is an arithmetic number, because the mean of its divisors is an integer number (101501065506961).

Almost surely, 2^{203002131013921} is an apocalyptic number.

It is an amenable number.

203002131013921 is a deficient number, since it is larger than the sum of its proper divisors (1).

203002131013921 is an equidigital number, since it uses as much as digits as its factorization.

203002131013921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 203002131013921 in words is "two hundred three trillion, two billion, one hundred thirty-one million, thirteen thousand, nine hundred twenty-one".