121615851 has 8 divisors (see below), whose sum is σ = 185319424. Its totient is φ = 69494760.

The previous prime is 121615849. The next prime is 121615873. The reversal of 121615851 is 158516121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121615851 - 2¹ = 121615849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121615831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2895595 + ... + 2895636.

It is an arithmetic number, because the mean of its divisors is an integer number (23164928).

Almost surely, 2^121615851 is an apocalyptic number.

121615851 is a deficient number, since it is larger than the sum of its proper divisors (63703573).

121615851 is an equidigital number, since it uses as much as digits as its factorization.

121615851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5791241.

The product of its digits is 2400, while the sum is 30.

The square root of 121615851 is about 11027.9576985043. The cubic root of 121615851 is about 495.4464577276.

The spelling of 121615851 in words is "one hundred twenty-one million, six hundred fifteen thousand, eight hundred fifty-one".