121375534147 has 16 divisors (see below), whose sum is σ = 139306482432. Its totient is φ = 103593313440.

The previous prime is 121375533977. The next prime is 121375534169. The reversal of 121375534147 is 741435573121.

It is a cyclic number.

It is not a de Polignac number, because 121375534147 - 2¹⁹ = 121375009859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121375534187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1746372 + ... + 1814542.

It is an arithmetic number, because the mean of its divisors is an integer number (8706655152).

Almost surely, 2^121375534147 is an apocalyptic number.

121375534147 is a deficient number, since it is larger than the sum of its proper divisors (17930948285).

121375534147 is an equidigital number, since it uses as much as digits as its factorization.

121375534147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69258.

The product of its digits is 352800, while the sum is 43.

The spelling of 121375534147 in words is "one hundred twenty-one billion, three hundred seventy-five million, five hundred thirty-four thousand, one hundred forty-seven".