2221242051 has 16 divisors (see below), whose sum is σ = 3385525248. Its totient is φ = 1268990400.

The previous prime is 2221242019. The next prime is 2221242059. The reversal of 2221242051 is 1502421222.

It is not a de Polignac number, because 2221242051 - 2⁵ = 2221242019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2221242059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110671 + ... + 129191.

It is an arithmetic number, because the mean of its divisors is an integer number (211595328).

Almost surely, 2^2221242051 is an apocalyptic number.

2221242051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2221242051 is a deficient number, since it is larger than the sum of its proper divisors (1164283197).

2221242051 is a wasteful number, since it uses less digits than its factorization.

2221242051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24242.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 2221242051 is about 47130.0546466902. The cubic root of 2221242051 is about 1304.7639901440.

Adding to 2221242051 its reverse (1502421222), we get a palindrome (3723663273).

The spelling of 2221242051 in words is "two billion, two hundred twenty-one million, two hundred forty-two thousand, fifty-one".