10131020402 has 4 divisors (see below), whose sum is σ = 15196530606. Its totient is φ = 5065510200.

The previous prime is 10131020387. The next prime is 10131020411. The reversal of 10131020402 is 20402013101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20402013101 = 677 ⋅30135913.

It can be written as a sum of positive squares in only one way, i.e., 7299822721 + 2831197681 = 85439^2 + 53209^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2532755099 + ... + 2532755102.

Almost surely, 2^10131020402 is an apocalyptic number.

10131020402 is a deficient number, since it is larger than the sum of its proper divisors (5065510204).

10131020402 is an equidigital number, since it uses as much as digits as its factorization.

10131020402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5065510203.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 10131020402 its reverse (20402013101), we get a palindrome (30533033503).

The spelling of 10131020402 in words is "ten billion, one hundred thirty-one million, twenty thousand, four hundred two".