212101012112021 has 2 divisors, whose sum is σ = 212101012112022. Its totient is φ = 212101012112020.

The previous prime is 212101012111979. The next prime is 212101012112111. The reversal of 212101012112021 is 120211210101212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211458537724996 + 642474387025 = 14541614^2 + 801545^2 .

It is a cyclic number.

It is not a de Polignac number, because 212101012112021 - 2¹⁸ = 212101011849877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212101012112921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106050506056010 + 106050506056011.

It is an arithmetic number, because the mean of its divisors is an integer number (106050506056011).

Almost surely, 2^{212101012112021} is an apocalyptic number.

It is an amenable number.

212101012112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

212101012112021 is an equidigital number, since it uses as much as digits as its factorization.

212101012112021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212101012112021 its reverse (120211210101212), we get a palindrome (332312222213233).

The spelling of 212101012112021 in words is "two hundred twelve trillion, one hundred one billion, twelve million, one hundred twelve thousand, twenty-one".