2121100202 has 8 divisors (see below), whose sum is σ = 3426392676. Its totient is φ = 978969312.

The previous prime is 2121100187. The next prime is 2121100211. The reversal of 2121100202 is 2020011212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2043853681 + 77246521 = 45209^2 + 8789^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40790363 + ... + 40790414.

Almost surely, 2^2121100202 is an apocalyptic number.

2121100202 is a deficient number, since it is larger than the sum of its proper divisors (1305292474).

2121100202 is a wasteful number, since it uses less digits than its factorization.

2121100202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81580792.

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

The square root of 2121100202 is about 46055.4036134741. The cubic root of 2121100202 is about 1284.8538448031.

Adding to 2121100202 its reverse (2020011212), we get a palindrome (4141111414).

The spelling of 2121100202 in words is "two billion, one hundred twenty-one million, one hundred thousand, two hundred two".