121232156 has 6 divisors (see below), whose sum is σ = 212156280. Its totient is φ = 60616076.

The previous prime is 121232143. The next prime is 121232159. The reversal of 121232156 is 651232121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121232159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15154016 + ... + 15154023.

It is an arithmetic number, because the mean of its divisors is an integer number (35359380).

Almost surely, 2^121232156 is an apocalyptic number.

It is an amenable number.

121232156 is a deficient number, since it is larger than the sum of its proper divisors (90924124).

121232156 is a wasteful number, since it uses less digits than its factorization.

121232156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30308043 (or 30308041 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 121232156 is about 11010.5474886583. The cubic root of 121232156 is about 494.9248683712.

Adding to 121232156 its reverse (651232121), we get a palindrome (772464277).

The spelling of 121232156 in words is "one hundred twenty-one million, two hundred thirty-two thousand, one hundred fifty-six".