131020001 has 4 divisors (see below), whose sum is σ = 149737152. Its totient is φ = 112302852.

The previous prime is 131019979. The next prime is 131020007. The reversal of 131020001 is 100020131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131020001 - 2¹⁸ = 130757857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131020007) 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, 9358565 + ... + 9358578.

It is an arithmetic number, because the mean of its divisors is an integer number (37434288).

Almost surely, 2^131020001 is an apocalyptic number.

It is an amenable number.

131020001 is a deficient number, since it is larger than the sum of its proper divisors (18717151).

131020001 is an equidigital number, since it uses as much as digits as its factorization.

131020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18717150.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 131020001 is about 11446.3968566532. The cubic root of 131020001 is about 507.9011538619.

Adding to 131020001 its reverse (100020131), we get a palindrome (231040132).

The spelling of 131020001 in words is "one hundred thirty-one million, twenty thousand, one".