221220111002 has 16 divisors (see below), whose sum is σ = 383290460352. Its totient is φ = 94639619520.

The previous prime is 221220110987. The next prime is 221220111043. The reversal of 221220111002 is 200111022122.

It is a super-3 number, since 3×221220111002³ (a number of 35 digits) contains 333 as substring.

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, 295748438 + ... + 295749185.

It is an arithmetic number, because the mean of its divisors is an integer number (23955653772).

Almost surely, 2^221220111002 is an apocalyptic number.

221220111002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221220111002 is a deficient number, since it is larger than the sum of its proper divisors (162070349350).

221220111002 is a wasteful number, since it uses less digits than its factorization.

221220111002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591497653.

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

Adding to 221220111002 its reverse (200111022122), we get a palindrome (421331133124).

The spelling of 221220111002 in words is "two hundred twenty-one billion, two hundred twenty million, one hundred eleven thousand, two".