121100511979 has 16 divisors (see below), whose sum is σ = 124596612000. Its totient is φ = 117662374656.

The previous prime is 121100511971. The next prime is 121100511989. The reversal of 121100511979 is 979115001121.

It is a cyclic number.

It is not a de Polignac number, because 121100511979 - 2³ = 121100511971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121100511971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2085957 + ... + 2143225.

It is an arithmetic number, because the mean of its divisors is an integer number (7787288250).

Almost surely, 2^121100511979 is an apocalyptic number.

121100511979 is a deficient number, since it is larger than the sum of its proper divisors (3496100021).

121100511979 is an equidigital number, since it uses as much as digits as its factorization.

121100511979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57774.

The product of its (nonzero) digits is 5670, while the sum is 37.

The spelling of 121100511979 in words is "one hundred twenty-one billion, one hundred million, five hundred eleven thousand, nine hundred seventy-nine".