121101210009979 has 4 divisors (see below), whose sum is σ = 121193022907440. Its totient is φ = 121009397112520.

The previous prime is 121101210009977. The next prime is 121101210010003. The reversal of 121101210009979 is 979900012101121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121101210009979 - 2¹ = 121101210009977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121101210009971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45906446752 + ... + 45906449389.

It is an arithmetic number, because the mean of its divisors is an integer number (30298255726860).

Almost surely, 2^{121101210009979} is an apocalyptic number.

121101210009979 is a deficient number, since it is larger than the sum of its proper divisors (91812897461).

121101210009979 is an equidigital number, since it uses as much as digits as its factorization.

121101210009979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91812897460.

The product of its (nonzero) digits is 20412, while the sum is 43.

The spelling of 121101210009979 in words is "one hundred twenty-one trillion, one hundred one billion, two hundred ten million, nine thousand, nine hundred seventy-nine".