10203121139 has 2 divisors, whose sum is σ = 10203121140. Its totient is φ = 10203121138.

The previous prime is 10203121079. The next prime is 10203121231. The reversal of 10203121139 is 93112130201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10203121139 - 2²⁰ = 10202072563 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (10203121039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101560569 + 5101560570.

It is an arithmetic number, because the mean of its divisors is an integer number (5101560570).

Almost surely, 2^10203121139 is an apocalyptic number.

10203121139 is a deficient number, since it is larger than the sum of its proper divisors (1).

10203121139 is an equidigital number, since it uses as much as digits as its factorization.

10203121139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 10203121139 in words is "ten billion, two hundred three million, one hundred twenty-one thousand, one hundred thirty-nine".