121891852 has 24 divisors (see below), whose sum is σ = 219702672. Its totient is φ = 59136000.

The previous prime is 121891837. The next prime is 121891867. The reversal of 121891852 is 258198121.

It is an interprime number because it is at equal distance from previous prime (121891837) and next prime (121891867).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29727 + ... + 33577.

It is an arithmetic number, because the mean of its divisors is an integer number (9154278).

Almost surely, 2^121891852 is an apocalyptic number.

It is an amenable number.

121891852 is a deficient number, since it is larger than the sum of its proper divisors (97810820).

121891852 is a wasteful number, since it uses less digits than its factorization.

121891852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4089 (or 4087 counting only the distinct ones).

The product of its digits is 11520, while the sum is 37.

The square root of 121891852 is about 11040.4643018308. The cubic root of 121891852 is about 495.8209714185.

It can be divided in two parts, 12189 and 1852, that added together give a palindrome (14041).

The spelling of 121891852 in words is "one hundred twenty-one million, eight hundred ninety-one thousand, eight hundred fifty-two".