121009192 has 8 divisors (see below), whose sum is σ = 226892250. Its totient is φ = 60504592.

The previous prime is 121009183. The next prime is 121009201. The reversal of 121009192 is 291900121.

It is an interprime number because it is at equal distance from previous prime (121009183) and next prime (121009201).

It can be written as a sum of positive squares in only one way, i.e., 99720196 + 21288996 = 9986^2 + 4614^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 7563067 + ... + 7563082.

Almost surely, 2^121009192 is an apocalyptic number.

It is an amenable number.

121009192 is a deficient number, since it is larger than the sum of its proper divisors (105883058).

121009192 is a wasteful number, since it uses less digits than its factorization.

121009192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15126155 (or 15126151 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 121009192 is about 11000.4178102470. The cubic root of 121009192 is about 494.6212686457.

The spelling of 121009192 in words is "one hundred twenty-one million, nine thousand, one hundred ninety-two".