121890148 has 12 divisors (see below), whose sum is σ = 215878320. Its totient is φ = 60210632.

The previous prime is 121890143. The next prime is 121890151. The reversal of 121890148 is 841098121.

It is not an unprimeable number, because it can be changed into a prime (121890143) 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, 183238 + ... + 183901.

It is an arithmetic number, because the mean of its divisors is an integer number (17989860).

Almost surely, 2^121890148 is an apocalyptic number.

It is an amenable number.

121890148 is a deficient number, since it is larger than the sum of its proper divisors (93988172).

121890148 is a wasteful number, since it uses less digits than its factorization.

121890148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367226 (or 367224 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 121890148 is about 11040.3871308936. The cubic root of 121890148 is about 495.8186609472.

The spelling of 121890148 in words is "one hundred twenty-one million, eight hundred ninety thousand, one hundred forty-eight".