212022131521 has 2 divisors, whose sum is σ = 212022131522. Its totient is φ = 212022131520.

The previous prime is 212022131359. The next prime is 212022131527. The reversal of 212022131521 is 125131220212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109868383296 + 102153748225 = 331464^2 + 319615^2 .

It is a cyclic number.

It is not a de Polignac number, because 212022131521 - 2³⁷ = 74583178049 is a prime.

It is a super-3 number, since 3×212022131521³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212022131492 and 212022131501.

It is not a weakly prime, because it can be changed into another prime (212022131527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106011065760 + 106011065761.

It is an arithmetic number, because the mean of its divisors is an integer number (106011065761).

Almost surely, 2^212022131521 is an apocalyptic number.

It is an amenable number.

212022131521 is a deficient number, since it is larger than the sum of its proper divisors (1).

212022131521 is an equidigital number, since it uses as much as digits as its factorization.

212022131521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 212022131521 its reverse (125131220212), we get a palindrome (337153351733).

The spelling of 212022131521 in words is "two hundred twelve billion, twenty-two million, one hundred thirty-one thousand, five hundred twenty-one".