1012331320021 has 4 divisors (see below), whose sum is σ = 1156950080032. Its totient is φ = 867712560012.

The previous prime is 1012331319973. The next prime is 1012331320061. The reversal of 1012331320021 is 1200231332101.

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 1012331320021 - 2¹⁹ = 1012330795733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012331320061) 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, 72309379995 + ... + 72309380008.

It is an arithmetic number, because the mean of its divisors is an integer number (289237520008).

Almost surely, 2^{1012331320021} is an apocalyptic number.

It is an amenable number.

1012331320021 is a deficient number, since it is larger than the sum of its proper divisors (144618760011).

1012331320021 is an equidigital number, since it uses as much as digits as its factorization.

1012331320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144618760010.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1012331320021 its reverse (1200231332101), we get a palindrome (2212562652122).

The spelling of 1012331320021 in words is "one trillion, twelve billion, three hundred thirty-one million, three hundred twenty thousand, twenty-one".