131102001 has 24 divisors (see below), whose sum is σ = 200129280. Its totient is φ = 82532736.

The previous prime is 131101991. The next prime is 131102003. The reversal of 131102001 is 100201131.

It is not a de Polignac number, because 131102001 - 2¹⁵ = 131069233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (131102003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12345 + ... + 20361.

It is an arithmetic number, because the mean of its divisors is an integer number (8338720).

Almost surely, 2^131102001 is an apocalyptic number.

It is an amenable number.

131102001 is a deficient number, since it is larger than the sum of its proper divisors (69027279).

131102001 is a wasteful number, since it uses less digits than its factorization.

131102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8125 (or 8122 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 131102001 is about 11449.9782095863. The cubic root of 131102001 is about 508.0070898736.

Adding to 131102001 its reverse (100201131), we get a palindrome (231303132).

The spelling of 131102001 in words is "one hundred thirty-one million, one hundred two thousand, one".