121332156 has 24 divisors (see below), whose sum is σ = 308845824. Its totient is φ = 36767280.

The previous prime is 121332121. The next prime is 121332191. The reversal of 121332156 is 651233121.

It is an interprime number because it is at equal distance from previous prime (121332121) and next prime (121332191).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459460 + ... + 459723.

It is an arithmetic number, because the mean of its divisors is an integer number (12868576).

Almost surely, 2^121332156 is an apocalyptic number.

It is an amenable number.

121332156 is an abundant number, since it is smaller than the sum of its proper divisors (187513668).

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

121332156 is a wasteful number, since it uses less digits than its factorization.

121332156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919201 (or 919199 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 121332156 is about 11015.0876528514. The cubic root of 121332156 is about 495.0609128182.

Adding to 121332156 its reverse (651233121), we get a palindrome (772565277).

The spelling of 121332156 in words is "one hundred twenty-one million, three hundred thirty-two thousand, one hundred fifty-six".