121155948 has 18 divisors (see below), whose sum is σ = 306255404. Its totient is φ = 40385304.

The previous prime is 121155941. The next prime is 121155949. The reversal of 121155948 is 849551121.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3365443 = 121155948 / (1 + 2 + 1 + 1 + 5 + 5 + 9 + 4 + 8).

It is not an unprimeable number, because it can be changed into a prime (121155941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1682686 + ... + 1682757.

Almost surely, 2^121155948 is an apocalyptic number.

121155948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121155948 is an abundant number, since it is smaller than the sum of its proper divisors (185099456).

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

121155948 is a wasteful number, since it uses less digits than its factorization.

121155948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3365453 (or 3365448 counting only the distinct ones).

The product of its digits is 14400, while the sum is 36.

The square root of 121155948 is about 11007.0862629490. The cubic root of 121155948 is about 494.8211413801.

It can be divided in two parts, 12 and 1155948, that added together give a triangular number (1155960 = T₁₅₂₀).

The spelling of 121155948 in words is "one hundred twenty-one million, one hundred fifty-five thousand, nine hundred forty-eight".