1021312023021 has 32 divisors (see below), whose sum is σ = 1562610009600. Its totient is φ = 658900408320.

The previous prime is 1021312023007. The next prime is 1021312023023. The reversal of 1021312023021 is 1203202131201.

1021312023021 is a `hidden beast` number, since 102 + 1 + 312 + 0 + 230 + 21 = 666.

It is not a de Polignac number, because 1021312023021 - 2⁷ = 1021312022893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021312022985 and 1021312023003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021312023023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4408500 + ... + 4634381.

It is an arithmetic number, because the mean of its divisors is an integer number (48831562800).

Almost surely, 2^{1021312023021} is an apocalyptic number.

It is an amenable number.

1021312023021 is a deficient number, since it is larger than the sum of its proper divisors (541297986579).

1021312023021 is an equidigital number, since it uses as much as digits as its factorization.

1021312023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9043026 (or 9043020 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1021312023021 its reverse (1203202131201), we get a palindrome (2224514154222).

The spelling of 1021312023021 in words is "one trillion, twenty-one billion, three hundred twelve million, twenty-three thousand, twenty-one".