1021122010021 has 2 divisors, whose sum is σ = 1021122010022. Its totient is φ = 1021122010020.

The previous prime is 1021122010003. The next prime is 1021122010033. The reversal of 1021122010021 is 1200102211201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 769504401796 + 251617608225 = 877214^2 + 501615^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021122010021 - 2⁵ = 1021122009989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021122009983 and 1021122010010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021122010061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510561005010 + 510561005011.

It is an arithmetic number, because the mean of its divisors is an integer number (510561005011).

Almost surely, 2^{1021122010021} is an apocalyptic number.

It is an amenable number.

1021122010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021122010021 is an equidigital number, since it uses as much as digits as its factorization.

1021122010021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021122010021 its reverse (1200102211201), we get a palindrome (2221224221222).

The spelling of 1021122010021 in words is "one trillion, twenty-one billion, one hundred twenty-two million, ten thousand, twenty-one".