212202112021 has 2 divisors, whose sum is σ = 212202112022. Its totient is φ = 212202112020.

The previous prime is 212202112007. The next prime is 212202112033. The reversal of 212202112021 is 120211202212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159892018225 + 52310093796 = 399865^2 + 228714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212202112021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212202111986 and 212202112004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212202118021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106101056010 + 106101056011.

It is an arithmetic number, because the mean of its divisors is an integer number (106101056011).

Almost surely, 2^212202112021 is an apocalyptic number.

It is an amenable number.

212202112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

212202112021 is an equidigital number, since it uses as much as digits as its factorization.

212202112021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212202112021 its reverse (120211202212), we get a palindrome (332413314233).

The spelling of 212202112021 in words is "two hundred twelve billion, two hundred two million, one hundred twelve thousand, twenty-one".