121144272556 has 24 divisors (see below), whose sum is σ = 212827414016. Its totient is φ = 60336530640.

The previous prime is 121144272551. The next prime is 121144272581. The reversal of 121144272556 is 655272441121.

It is a super-3 number, since 3×121144272556³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121144272551) 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, 8130145 + ... + 8145031.

Almost surely, 2^121144272556 is an apocalyptic number.

It is an amenable number.

121144272556 is a deficient number, since it is larger than the sum of its proper divisors (91683141460).

121144272556 is a wasteful number, since it uses less digits than its factorization.

121144272556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22669 (or 22667 counting only the distinct ones).

The product of its digits is 134400, while the sum is 40.

The spelling of 121144272556 in words is "one hundred twenty-one billion, one hundred forty-four million, two hundred seventy-two thousand, five hundred fifty-six".