2113021777 has 4 divisors (see below), whose sum is σ = 2113191936. Its totient is φ = 2112851620.

The previous prime is 2113021759. The next prime is 2113021793. The reversal of 2113021777 is 7771203112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113021777 is a prime.

It is a super-2 number, since 2×2113021777² = 8929722060152475458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2113021177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64849 + ... + 91822.

It is an arithmetic number, because the mean of its divisors is an integer number (528297984).

Almost surely, 2^2113021777 is an apocalyptic number.

It is an amenable number.

2113021777 is a deficient number, since it is larger than the sum of its proper divisors (170159).

2113021777 is a wasteful number, since it uses less digits than its factorization.

2113021777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170158.

The product of its (nonzero) digits is 4116, while the sum is 31.

The square root of 2113021777 is about 45967.6166121325. The cubic root of 2113021777 is about 1283.2206042470.

Adding to 2113021777 its reverse (7771203112), we get a palindrome (9884224889).

The spelling of 2113021777 in words is "two billion, one hundred thirteen million, twenty-one thousand, seven hundred seventy-seven".