121451551552 has 28 divisors (see below), whose sum is σ = 242351844480. Its totient is φ = 60386519936.

The previous prime is 121451551489. The next prime is 121451551553. The reversal of 121451551552 is 255155154121.

It is a super-2 number, since 2×121451551552² (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 (121451551553) 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, 5289328 + ... + 5312239.

Almost surely, 2^121451551552 is an apocalyptic number.

It is an amenable number.

121451551552 is a deficient number, since it is larger than the sum of its proper divisors (120900292928).

121451551552 is a wasteful number, since it uses less digits than its factorization.

121451551552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10601758 (or 10601748 counting only the distinct ones).

The product of its digits is 50000, while the sum is 37.

The spelling of 121451551552 in words is "one hundred twenty-one billion, four hundred fifty-one million, five hundred fifty-one thousand, five hundred fifty-two".