121559645253 has 8 divisors (see below), whose sum is σ = 162341370400. Its totient is φ = 80908841808.

The previous prime is 121559645201. The next prime is 121559645267. The reversal of 121559645253 is 352546955121.

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

It is not a de Polignac number, because 121559645253 - 2¹³ = 121559637061 is a prime.

It is a super-3 number, since 3×121559645253³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121559643253) 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, 32728258 + ... + 32731971.

It is an arithmetic number, because the mean of its divisors is an integer number (20292671300).

Almost surely, 2^121559645253 is an apocalyptic number.

It is an amenable number.

121559645253 is a deficient number, since it is larger than the sum of its proper divisors (40781725147).

121559645253 is an equidigital number, since it uses as much as digits as its factorization.

121559645253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65460851.

The product of its digits is 1620000, while the sum is 48.

The spelling of 121559645253 in words is "one hundred twenty-one billion, five hundred fifty-nine million, six hundred forty-five thousand, two hundred fifty-three".