122121010202111 has 2 divisors, whose sum is σ = 122121010202112. Its totient is φ = 122121010202110.

The previous prime is 122121010202017. The next prime is 122121010202143. The reversal of 122121010202111 is 111202010121221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122121010202111 - 2¹⁸ = 122121009939967 is a prime.

It is a super-2 number, since 2×122121010202111² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 122121010202111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122121010202171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61060505101055 + 61060505101056.

It is an arithmetic number, because the mean of its divisors is an integer number (61060505101056).

Almost surely, 2^{122121010202111} is an apocalyptic number.

122121010202111 is a deficient number, since it is larger than the sum of its proper divisors (1).

122121010202111 is an equidigital number, since it uses as much as digits as its factorization.

122121010202111 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 122121010202111 its reverse (111202010121221), we get a palindrome (233323020323332).

The spelling of 122121010202111 in words is "one hundred twenty-two trillion, one hundred twenty-one billion, ten million, two hundred two thousand, one hundred eleven".