121156 has 12 divisors (see below), whose sum is σ = 242368. Its totient is φ = 51912.

The previous prime is 121151. The next prime is 121157. The reversal of 121156 is 651121.

It is a happy number.

121156 is an admirable number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (121151) 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, 2136 + ... + 2191.

2¹²¹¹⁵⁶ is an apocalyptic number.

It is an amenable number.

121156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121156 is a wasteful number, since it uses less digits than its factorization.

121156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4338 (or 4336 counting only the distinct ones).

The product of its digits is 60, while the sum is 16.

The square root of 121156 is about 348.0747046253. The cubic root of 121156 is about 49.4821212172.

Adding to 121156 its reverse (651121), we get a palindrome (772277).

It can be divided in two parts, 12115 and 6, that added together give a palindrome (12121).

The spelling of 121156 in words is "one hundred twenty-one thousand, one hundred fifty-six".