2221421210 has 8 divisors (see below), whose sum is σ = 3998558196. Its totient is φ = 888568480.

The previous prime is 2221421177. The next prime is 2221421231. The reversal of 2221421210 is 121241222.

It can be written as a sum of positive squares in 2 ways, for example, as 2149527769 + 71893441 = 46363^2 + 8479^2 .

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

It is a Curzon number.

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, 111071051 + ... + 111071070.

Almost surely, 2^2221421210 is an apocalyptic number.

2221421210 is a deficient number, since it is larger than the sum of its proper divisors (1777136986).

2221421210 is a wasteful number, since it uses less digits than its factorization.

2221421210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222142128.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2221421210 is about 47131.9552957439. The cubic root of 2221421210 is about 1304.7990687055.

Adding to 2221421210 its reverse (121241222), we get a palindrome (2342662432).

The spelling of 2221421210 in words is "two billion, two hundred twenty-one million, four hundred twenty-one thousand, two hundred ten".