221111220010 has 16 divisors (see below), whose sum is σ = 398006712072. Its totient is φ = 88443040000.

The previous prime is 221111219971. The next prime is 221111220013. The reversal of 221111220010 is 10022111122.

It can be written as a sum of positive squares in 4 ways, for example, as 140397841809 + 80713378201 = 374697^2 + 284101^2 .

It is a super-2 number, since 2×221111220010² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221111220013) 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, 635910 + ... + 920110.

Almost surely, 2^221111220010 is an apocalyptic number.

221111220010 is a deficient number, since it is larger than the sum of its proper divisors (176895492062).

221111220010 is a wasteful number, since it uses less digits than its factorization.

221111220010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362009.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221111220010 its reverse (10022111122), we get a palindrome (231133331132).

The spelling of 221111220010 in words is "two hundred twenty-one billion, one hundred eleven million, two hundred twenty thousand, ten".