121039156 has 48 divisors (see below), whose sum is σ = 261354240. Its totient is φ = 47900160.

The previous prime is 121039151. The next prime is 121039157. The reversal of 121039156 is 651930121.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121039151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15436 + ... + 21916.

It is an arithmetic number, because the mean of its divisors is an integer number (5444880).

Almost surely, 2^121039156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121039156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130677120).

121039156 is an abundant number, since it is smaller than the sum of its proper divisors (140315084).

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

121039156 is a wasteful number, since it uses less digits than its factorization.

121039156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6544 (or 6542 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 121039156 is about 11001.7796742163. The cubic root of 121039156 is about 494.6620909125.

Adding to 121039156 its reverse (651930121), we get a palindrome (772969277).

The spelling of 121039156 in words is "one hundred twenty-one million, thirty-nine thousand, one hundred fifty-six".