121749051 has 8 divisors (see below), whose sum is σ = 169390080. Its totient is φ = 77637032.

The previous prime is 121749041. The next prime is 121749071. The reversal of 121749051 is 150947121.

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

It is a cyclic number.

It is not a de Polignac number, because 121749051 - 2¹⁸ = 121486907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121749011) 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, 882171 + ... + 882308.

It is an arithmetic number, because the mean of its divisors is an integer number (21173760).

Almost surely, 2^121749051 is an apocalyptic number.

121749051 is a deficient number, since it is larger than the sum of its proper divisors (47641029).

121749051 is a wasteful number, since it uses less digits than its factorization.

121749051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1764505.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 121749051 is about 11033.9952419783. The cubic root of 121749051 is about 495.6272713006.

The spelling of 121749051 in words is "one hundred twenty-one million, seven hundred forty-nine thousand, fifty-one".