2200121521 has 8 divisors (see below), whose sum is σ = 2508736104. Its totient is φ = 1911417600.

The previous prime is 2200121519. The next prime is 2200121533. The reversal of 2200121521 is 1251210022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 76755121 + 2123366400 = 8761^2 + 46080^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2200121521 - 2¹ = 2200121519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2200121495 and 2200121504.

It is not an unprimeable number, because it can be changed into a prime (2200121501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4977430 + ... + 4977871.

It is an arithmetic number, because the mean of its divisors is an integer number (313592013).

Almost surely, 2^2200121521 is an apocalyptic number.

It is an amenable number.

2200121521 is a deficient number, since it is larger than the sum of its proper divisors (308614583).

2200121521 is a wasteful number, since it uses less digits than its factorization.

2200121521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9955331.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2200121521 is about 46905.4529985587. The cubic root of 2200121521 is about 1300.6153932549.

Adding to 2200121521 its reverse (1251210022), we get a palindrome (3451331543).

The spelling of 2200121521 in words is "two billion, two hundred million, one hundred twenty-one thousand, five hundred twenty-one".