121896261 has 12 divisors (see below), whose sum is σ = 176537088. Its totient is φ = 81049704.

The previous prime is 121896223. The next prime is 121896263. The reversal of 121896261 is 162698121.

121896261 is a `hidden beast` number, since 1 + 21 + 8 + 9 + 626 + 1 = 666.

It is not a de Polignac number, because 121896261 - 2⁶ = 121896197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121896263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14235 + ... + 21128.

It is an arithmetic number, because the mean of its divisors is an integer number (14711424).

Almost surely, 2^121896261 is an apocalyptic number.

It is an amenable number.

121896261 is a deficient number, since it is larger than the sum of its proper divisors (54640827).

121896261 is a wasteful number, since it uses less digits than its factorization.

121896261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35752 (or 35749 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 121896261 is about 11040.6639745986. The cubic root of 121896261 is about 495.8269495275.

It can be divided in two parts, 1218 and 96261, that added together give a palindrome (97479).

The spelling of 121896261 in words is "one hundred twenty-one million, eight hundred ninety-six thousand, two hundred sixty-one".