121700144 has 20 divisors (see below), whose sum is σ = 249664824. Its totient is φ = 57270528.

The previous prime is 121700129. The next prime is 121700147. The reversal of 121700144 is 441007121.

It is not an unprimeable number, because it can be changed into a prime (121700147) 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, 223442 + ... + 223985.

Almost surely, 2^121700144 is an apocalyptic number.

It is an amenable number.

121700144 is an abundant number, since it is smaller than the sum of its proper divisors (127964680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121700144 is a wasteful number, since it uses less digits than its factorization.

121700144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447452 (or 447446 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 121700144 is about 11031.7788230185. The cubic root of 121700144 is about 495.5608973694.

Adding to 121700144 its reverse (441007121), we get a palindrome (562707265).

The spelling of 121700144 in words is "one hundred twenty-one million, seven hundred thousand, one hundred forty-four".