121010101019979 has 8 divisors (see below), whose sum is σ = 162944294443152. Its totient is φ = 79874654138400.

The previous prime is 121010101019963. The next prime is 121010101019981. The reversal of 121010101019979 is 979910101010121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121010101019979 - 2⁴ = 121010101019963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121010101019979.

It is not an unprimeable number, because it can be changed into a prime (121010101019909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199686635044 + ... + 199686635649.

It is an arithmetic number, because the mean of its divisors is an integer number (20368036805394).

Almost surely, 2^{121010101019979} is an apocalyptic number.

121010101019979 is a deficient number, since it is larger than the sum of its proper divisors (41934193423173).

121010101019979 is a wasteful number, since it uses less digits than its factorization.

121010101019979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399373270797.

The product of its (nonzero) digits is 10206, while the sum is 42.

The spelling of 121010101019979 in words is "one hundred twenty-one trillion, ten billion, one hundred one million, nineteen thousand, nine hundred seventy-nine".