121102111000021 has 2 divisors, whose sum is σ = 121102111000022. Its totient is φ = 121102111000020.

The previous prime is 121102110999983. The next prime is 121102111000033. The reversal of 121102111000021 is 120000111201121.

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., 111511699208100 + 9590411791921 = 10559910^2 + 3096839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121102111000021 is a prime.

It is a super-2 number, since 2×121102111000021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121102110999965 and 121102111000010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121102111000121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60551055500010 + 60551055500011.

It is an arithmetic number, because the mean of its divisors is an integer number (60551055500011).

Almost surely, 2^{121102111000021} is an apocalyptic number.

It is an amenable number.

121102111000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121102111000021 is an equidigital number, since it uses as much as digits as its factorization.

121102111000021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121102111000021 its reverse (120000111201121), we get a palindrome (241102222201142).

The spelling of 121102111000021 in words is "one hundred twenty-one trillion, one hundred two billion, one hundred eleven million, twenty-one", and thus it is an aban number.