121812902 has 4 divisors (see below), whose sum is σ = 182719356. Its totient is φ = 60906450.

The previous prime is 121812883. The next prime is 121812907. The reversal of 121812902 is 209218121.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121812907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30453224 + ... + 30453227.

It is an arithmetic number, because the mean of its divisors is an integer number (45679839).

Almost surely, 2^121812902 is an apocalyptic number.

121812902 is a deficient number, since it is larger than the sum of its proper divisors (60906454).

121812902 is an equidigital number, since it uses as much as digits as its factorization.

121812902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60906453.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 121812902 is about 11036.8882389920. Note that the first 3 decimals coincide. The cubic root of 121812902 is about 495.7138996726.

The spelling of 121812902 in words is "one hundred twenty-one million, eight hundred twelve thousand, nine hundred two".