1021001213131 has 4 divisors (see below), whose sum is σ = 1033925279200. Its totient is φ = 1008077147064.

The previous prime is 1021001213129. The next prime is 1021001213153. The reversal of 1021001213131 is 1313121001201.

It is a happy number.

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

It is not a de Polignac number, because 1021001213131 - 2¹ = 1021001213129 is a prime.

It is a super-2 number, since 2×1021001213131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021001213161) 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, 6462032916 + ... + 6462033073.

It is an arithmetic number, because the mean of its divisors is an integer number (258481319800).

Almost surely, 2^{1021001213131} is an apocalyptic number.

1021001213131 is a deficient number, since it is larger than the sum of its proper divisors (12924066069).

1021001213131 is an equidigital number, since it uses as much as digits as its factorization.

1021001213131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12924066068.

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

Adding to 1021001213131 its reverse (1313121001201), we get a palindrome (2334122214332).

The spelling of 1021001213131 in words is "one trillion, twenty-one billion, one million, two hundred thirteen thousand, one hundred thirty-one".