2121149977 has 8 divisors (see below), whose sum is σ = 2151724640. Its totient is φ = 2090616480.

The previous prime is 2121149969. The next prime is 2121150029. The reversal of 2121149977 is 7799411212.

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 2121149977 - 2³ = 2121149969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121149957) 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, 102274 + ... + 121252.

It is an arithmetic number, because the mean of its divisors is an integer number (268965580).

Almost surely, 2^2121149977 is an apocalyptic number.

It is an amenable number.

2121149977 is a deficient number, since it is larger than the sum of its proper divisors (30574663).

2121149977 is a wasteful number, since it uses less digits than its factorization.

2121149977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20583.

The product of its digits is 63504, while the sum is 43.

The square root of 2121149977 is about 46055.9439920625. The cubic root of 2121149977 is about 1284.8638951062.

The spelling of 2121149977 in words is "two billion, one hundred twenty-one million, one hundred forty-nine thousand, nine hundred seventy-seven".