121142953579 has 4 divisors (see below), whose sum is σ = 121191863184. Its totient is φ = 121094043976.

The previous prime is 121142953567. The next prime is 121142953669. The reversal of 121142953579 is 975359241121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121142953579 is a prime.

It is a super-3 number, since 3×121142953579³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121142953549) 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, 24451087 + ... + 24456040.

It is an arithmetic number, because the mean of its divisors is an integer number (30297965796).

Almost surely, 2^121142953579 is an apocalyptic number.

121142953579 is a deficient number, since it is larger than the sum of its proper divisors (48909605).

121142953579 is an equidigital number, since it uses as much as digits as its factorization.

121142953579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48909604.

The product of its digits is 680400, while the sum is 49.

The spelling of 121142953579 in words is "one hundred twenty-one billion, one hundred forty-two million, nine hundred fifty-three thousand, five hundred seventy-nine".