212022101021 has 2 divisors, whose sum is σ = 212022101022. Its totient is φ = 212022101020.

The previous prime is 212022100943. The next prime is 212022101033. The reversal of 212022101021 is 120101220212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127869892921 + 84152208100 = 357589^2 + 290090^2 .

It is a cyclic number.

It is not a de Polignac number, because 212022101021 - 2²² = 212017906717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212022100987 and 212022101005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212022100021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106011050510 + 106011050511.

It is an arithmetic number, because the mean of its divisors is an integer number (106011050511).

Almost surely, 2^212022101021 is an apocalyptic number.

It is an amenable number.

212022101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

212022101021 is an equidigital number, since it uses as much as digits as its factorization.

212022101021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212022101021 its reverse (120101220212), we get a palindrome (332123321233).

The spelling of 212022101021 in words is "two hundred twelve billion, twenty-two million, one hundred one thousand, twenty-one".