1021231131001 has 4 divisors (see below), whose sum is σ = 1021332143104. Its totient is φ = 1021130118900.

The previous prime is 1021231130987. The next prime is 1021231131013. The reversal of 1021231131001 is 1001311321201.

It is a happy number.

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 1021231131001 - 2²⁵ = 1021197576569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021231131031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50490885 + ... + 50511106.

It is an arithmetic number, because the mean of its divisors is an integer number (255333035776).

Almost surely, 2^{1021231131001} is an apocalyptic number.

It is an amenable number.

1021231131001 is a deficient number, since it is larger than the sum of its proper divisors (101012103).

1021231131001 is a wasteful number, since it uses less digits than its factorization.

1021231131001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101012102.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1021231131001 its reverse (1001311321201), we get a palindrome (2022542452202).

The spelling of 1021231131001 in words is "one trillion, twenty-one billion, two hundred thirty-one million, one hundred thirty-one thousand, one".