121260264478 has 16 divisors (see below), whose sum is σ = 194496667344. Its totient is φ = 56498665600.

The previous prime is 121260264473. The next prime is 121260264481. The reversal of 121260264478 is 874462062121.

It is a super-2 number, since 2×121260264478² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121260264473) 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, 17652400 + ... + 17659267.

It is an arithmetic number, because the mean of its divisors is an integer number (12156041709).

Almost surely, 2^121260264478 is an apocalyptic number.

121260264478 is a deficient number, since it is larger than the sum of its proper divisors (73236402866).

121260264478 is a wasteful number, since it uses less digits than its factorization.

121260264478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35311787.

The product of its (nonzero) digits is 258048, while the sum is 43.

The spelling of 121260264478 in words is "one hundred twenty-one billion, two hundred sixty million, two hundred sixty-four thousand, four hundred seventy-eight".