2113122021 has 16 divisors (see below), whose sum is σ = 2916873984. Its totient is φ = 1359880704.

The previous prime is 2113122019. The next prime is 2113122041. The reversal of 2113122021 is 1202213112.

It is not a de Polignac number, because 2113122021 - 2¹ = 2113122019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113122041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92356 + ... + 112941.

It is an arithmetic number, because the mean of its divisors is an integer number (182304624).

Almost surely, 2^2113122021 is an apocalyptic number.

It is an amenable number.

2113122021 is a deficient number, since it is larger than the sum of its proper divisors (803751963).

2113122021 is a wasteful number, since it uses less digits than its factorization.

2113122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205420.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2113122021 is about 45968.7069755067. The cubic root of 2113122021 is about 1283.2408963761.

Adding to 2113122021 its reverse (1202213112), we get a palindrome (3315335133).

The spelling of 2113122021 in words is "two billion, one hundred thirteen million, one hundred twenty-two thousand, twenty-one".