121161142252 has 6 divisors (see below), whose sum is σ = 212031998948. Its totient is φ = 60580571124.

The previous prime is 121161142241. The next prime is 121161142259. The reversal of 121161142252 is 252241161121.

It is a self number, because there is not a number n which added to its sum of digits gives 121161142252.

It is not an unprimeable number, because it can be changed into a prime (121161142259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15145142778 + ... + 15145142785.

Almost surely, 2^121161142252 is an apocalyptic number.

It is an amenable number.

121161142252 is a deficient number, since it is larger than the sum of its proper divisors (90870856696).

121161142252 is a wasteful number, since it uses less digits than its factorization.

121161142252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30290285567 (or 30290285565 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The spelling of 121161142252 in words is "one hundred twenty-one billion, one hundred sixty-one million, one hundred forty-two thousand, two hundred fifty-two".