121531150 has 48 divisors (see below), whose sum is σ = 247640400. Its totient is φ = 44098560.

The previous prime is 121531127. The next prime is 121531153. The reversal of 121531150 is 51135121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121531153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36766 + ... + 39934.

It is an arithmetic number, because the mean of its divisors is an integer number (5159175).

Almost surely, 2^121531150 is an apocalyptic number.

121531150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121531150 is an abundant number, since it is smaller than the sum of its proper divisors (126109250).

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

121531150 is a wasteful number, since it uses less digits than its factorization.

121531150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253 (or 3248 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 121531150 is about 11024.1167446649. The cubic root of 121531150 is about 495.3314108919.

Adding to 121531150 its reverse (51135121), we get a palindrome (172666271).

The spelling of 121531150 in words is "one hundred twenty-one million, five hundred thirty-one thousand, one hundred fifty".