2120769961 has 8 divisors (see below), whose sum is σ = 2161677024. Its totient is φ = 2080135200.

The previous prime is 2120769953. The next prime is 2120769979. The reversal of 2120769961 is 1699670212.

It is a happy number.

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 2120769961 - 2³ = 2120769953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120769061) 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, 52315 + ... + 83536.

It is an arithmetic number, because the mean of its divisors is an integer number (270209628).

Almost surely, 2^2120769961 is an apocalyptic number.

It is an amenable number.

2120769961 is a deficient number, since it is larger than the sum of its proper divisors (40907063).

2120769961 is a wasteful number, since it uses less digits than its factorization.

2120769961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136151.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 2120769961 is about 46051.8182160053. The cubic root of 2120769961 is about 1284.7871603154.

The spelling of 2120769961 in words is "two billion, one hundred twenty million, seven hundred sixty-nine thousand, nine hundred sixty-one".