1012922021 has 2 divisors, whose sum is σ = 1012922022. Its totient is φ = 1012922020.

The previous prime is 1012922003. The next prime is 1012922069. The reversal of 1012922021 is 1202292101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 846228100 + 166693921 = 29090^2 + 12911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012922021 - 2²² = 1008727717 is a prime.

It is a super-2 number, since 2×1012922021² = 2052022041253448882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1012921984 and 1012922002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012922221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506461010 + 506461011.

It is an arithmetic number, because the mean of its divisors is an integer number (506461011).

Almost surely, 2^1012922021 is an apocalyptic number.

It is an amenable number.

1012922021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012922021 is an equidigital number, since it uses as much as digits as its factorization.

1012922021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1012922021 is about 31826.4358827689. The cubic root of 1012922021 is about 1004.2889192074.

The spelling of 1012922021 in words is "one billion, twelve million, nine hundred twenty-two thousand, twenty-one".