2131402001 has 4 divisors (see below), whose sum is σ = 2139695652. Its totient is φ = 2123108352.

The previous prime is 2131401997. The next prime is 2131402033. The reversal of 2131402001 is 1002041312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1768118401 + 363283600 = 42049^2 + 19060^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131402001 - 2² = 2131401997 is a prime.

It is a super-3 number, since 3×2131402001³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131402051) 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, 4146440 + ... + 4146953.

It is an arithmetic number, because the mean of its divisors is an integer number (534923913).

Almost surely, 2^2131402001 is an apocalyptic number.

It is an amenable number.

2131402001 is a deficient number, since it is larger than the sum of its proper divisors (8293651).

2131402001 is an equidigital number, since it uses as much as digits as its factorization.

2131402001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8293650.

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

The square root of 2131402001 is about 46167.1095153249. The cubic root of 2131402001 is about 1286.9305870043.

Adding to 2131402001 its reverse (1002041312), we get a palindrome (3133443313).

The spelling of 2131402001 in words is "two billion, one hundred thirty-one million, four hundred two thousand, one".