221222220010 has 192 divisors, whose sum is σ = 453843909792. Its totient is φ = 77552640000.

The previous prime is 221222220007. The next prime is 221222220019. The reversal of 221222220010 is 10022222122.

It can be written as a sum of positive squares in 16 ways, for example, as 26371486449 + 194850733561 = 162393^2 + 441419^2 .

It is not an unprimeable number, because it can be changed into a prime (221222220019) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1222222120 + ... + 1222222300.

Almost surely, 2^221222220010 is an apocalyptic number.

221222220010 is an abundant number, since it is smaller than the sum of its proper divisors (232621689782).

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

221222220010 is a wasteful number, since it uses less digits than its factorization.

221222220010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 221222220010 its reverse (10022222122), we get a palindrome (231244442132).

It can be divided in two parts, 2212 and 22220010, that added together give a palindrome (22222222).

The spelling of 221222220010 in words is "two hundred twenty-one billion, two hundred twenty-two million, two hundred twenty thousand, ten".