2101122021 has 16 divisors (see below), whose sum is σ = 2970571968. Its totient is φ = 1316448000.

The previous prime is 2101122017. The next prime is 2101122031. The reversal of 2101122021 is 1202211012.

It is not a de Polignac number, because 2101122021 - 2² = 2101122017 is a prime.

It is a super-2 number, since 2×2101122021² = 8829427494262248882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2101121988 and 2101122006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101122031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6366 + ... + 65136.

It is an arithmetic number, because the mean of its divisors is an integer number (185660748).

Almost surely, 2^2101122021 is an apocalyptic number.

It is an amenable number.

2101122021 is a deficient number, since it is larger than the sum of its proper divisors (869449947).

2101122021 is a wasteful number, since it uses less digits than its factorization.

2101122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59492.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2101122021 is about 45837.9975675203. The cubic root of 2101122021 is about 1280.8071937006.

Adding to 2101122021 its reverse (1202211012), we get a palindrome (3303333033).

The spelling of 2101122021 in words is "two billion, one hundred one million, one hundred twenty-two thousand, twenty-one".