121153544 has 16 divisors (see below), whose sum is σ = 229369920. Its totient is φ = 59988240.

The previous prime is 121153541. The next prime is 121153553. The reversal of 121153544 is 445351121.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (121153541) 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, 72692 + ... + 74339.

It is an arithmetic number, because the mean of its divisors is an integer number (14335620).

Almost surely, 2^121153544 is an apocalyptic number.

It is an amenable number.

121153544 is a deficient number, since it is larger than the sum of its proper divisors (108216376).

121153544 is a wasteful number, since it uses less digits than its factorization.

121153544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147140 (or 147136 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 121153544 is about 11006.9770600288. The cubic root of 121153544 is about 494.8178685792.

The spelling of 121153544 in words is "one hundred twenty-one million, one hundred fifty-three thousand, five hundred forty-four".