121121010019979 has 2 divisors, whose sum is σ = 121121010019980. Its totient is φ = 121121010019978.

The previous prime is 121121010019949. The next prime is 121121010020009. The reversal of 121121010019979 is 979910010121121.

It is a balanced prime because it is at equal distance from previous prime (121121010019949) and next prime (121121010020009).

It is an emirp because it is prime and its reverse (979910010121121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121121010019979 - 2²⁴ = 121120993242763 is a prime.

It is not a weakly prime, because it can be changed into another prime (121121010019909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560505009989 + 60560505009990.

It is an arithmetic number, because the mean of its divisors is an integer number (60560505009990).

Almost surely, 2^{121121010019979} is an apocalyptic number.

121121010019979 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121010019979 is an equidigital number, since it uses as much as digits as its factorization.

121121010019979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 44.

The spelling of 121121010019979 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, ten million, nineteen thousand, nine hundred seventy-nine".