221002112211220 has 48 divisors (see below), whose sum is σ = 488532638764800. Its totient is φ = 83747885316480.

The previous prime is 221002112211137. The next prime is 221002112211269. The reversal of 221002112211220 is 22112211200122.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136721925 + ... + 138328915.

It is an arithmetic number, because the mean of its divisors is an integer number (10177763307600).

Almost surely, 2^{221002112211220} is an apocalyptic number.

221002112211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221002112211220 is an abundant number, since it is smaller than the sum of its proper divisors (267530526553580).

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

221002112211220 is a wasteful number, since it uses less digits than its factorization.

221002112211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968928 (or 1968926 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221002112211220 its reverse (22112211200122), we get a palindrome (243114323411342).

The spelling of 221002112211220 in words is "two hundred twenty-one trillion, two billion, one hundred twelve million, two hundred eleven thousand, two hundred twenty".