2200121021 has 16 divisors (see below), whose sum is σ = 2572176000. Its totient is φ = 1881087264.

The previous prime is 2200120999. The next prime is 2200121023. The reversal of 2200121021 is 1201210022.

It is a happy number.

2200121021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-2200121021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2200120993 and 2200121011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2200121023) 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, 132446 + ... + 148128.

It is an arithmetic number, because the mean of its divisors is an integer number (160761000).

Almost surely, 2^2200121021 is an apocalyptic number.

It is an amenable number.

2200121021 is a deficient number, since it is larger than the sum of its proper divisors (372054979).

2200121021 is an equidigital number, since it uses as much as digits as its factorization.

2200121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16113 (or 16099 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2200121021 is about 46905.4476686877. The cubic root of 2200121021 is about 1300.6152947289.

Adding to 2200121021 its reverse (1201210022), we get a palindrome (3401331043).

The spelling of 2200121021 in words is "two billion, two hundred million, one hundred twenty-one thousand, twenty-one".