2221121210 has 32 divisors (see below), whose sum is σ = 4984543872. Its totient is φ = 692297280.

The previous prime is 2221121173. The next prime is 2221121239. The reversal of 2221121210 is 121211222.

2221121210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1441517 + ... + 1443056.

It is an arithmetic number, because the mean of its divisors is an integer number (155766996).

Almost surely, 2^2221121210 is an apocalyptic number.

2221121210 is an abundant number, since it is smaller than the sum of its proper divisors (2763422662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221121210 is a wasteful number, since it uses less digits than its factorization.

2221121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2884598.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2221121210 is about 47128.7726341351. The cubic root of 2221121210 is about 1304.7403289309.

Adding to 2221121210 its reverse (121211222), we get a palindrome (2342332432).

It can be divided in two parts, 22211212 and 10, that added together give a palindrome (22211222).

The spelling of 2221121210 in words is "two billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred ten".