221221000102 has 16 divisors (see below), whose sum is σ = 357980267232. Its totient is φ = 102139772800.

The previous prime is 221221000093. The next prime is 221221000157. The reversal of 221221000102 is 201000122122.

It is a happy number.

It is a super-2 number, since 2×221221000102² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61380274 + ... + 61383877.

It is an arithmetic number, because the mean of its divisors is an integer number (22373766702).

Almost surely, 2^221221000102 is an apocalyptic number.

221221000102 is a deficient number, since it is larger than the sum of its proper divisors (136759267130).

221221000102 is a wasteful number, since it uses less digits than its factorization.

221221000102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122764223.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221221000102 its reverse (201000122122), we get a palindrome (422221122224).

The spelling of 221221000102 in words is "two hundred twenty-one billion, two hundred twenty-one million, one hundred two", and thus it is an aban number.