2200121001 has 64 divisors (see below), whose sum is σ = 3599043840. Its totient is φ = 1319984640.

The previous prime is 2200120999. The next prime is 2200121023. The reversal of 2200121001 is 1001210022.

It is not a de Polignac number, because 2200121001 - 2¹ = 2200120999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2200121071) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4222621 + ... + 4223141.

It is an arithmetic number, because the mean of its divisors is an integer number (56235060).

Almost surely, 2^2200121001 is an apocalyptic number.

It is an amenable number.

2200121001 is a deficient number, since it is larger than the sum of its proper divisors (1398922839).

2200121001 is a wasteful number, since it uses less digits than its factorization.

2200121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 817 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2200121001 is about 46905.4474554928. The cubic root of 2200121001 is about 1300.6152907878.

Adding to 2200121001 its reverse (1001210022), we get a palindrome (3201331023).

It can be divided in two parts, 2200 and 121001, that added together give a square (123201 = 351²).

The spelling of 2200121001 in words is "two billion, two hundred million, one hundred twenty-one thousand, one".