202012211221111 has 2 divisors, whose sum is σ = 202012211221112. Its totient is φ = 202012211221110.

The previous prime is 202012211221103. The next prime is 202012211221157. The reversal of 202012211221111 is 111122112210202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 202012211221111 - 2³ = 202012211221103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202012251221111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101006105610555 + 101006105610556.

It is an arithmetic number, because the mean of its divisors is an integer number (101006105610556).

Almost surely, 2^{202012211221111} is an apocalyptic number.

202012211221111 is a deficient number, since it is larger than the sum of its proper divisors (1).

202012211221111 is an equidigital number, since it uses as much as digits as its factorization.

202012211221111 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 19.

Adding to 202012211221111 its reverse (111122112210202), we get a palindrome (313134323431313).

The spelling of 202012211221111 in words is "two hundred two trillion, twelve billion, two hundred eleven million, two hundred twenty-one thousand, one hundred eleven".