221110120020 has 48 divisors (see below), whose sum is σ = 619210021248. Its totient is φ = 58953014400.

The previous prime is 221110120001. The next prime is 221110120039. The reversal of 221110120020 is 20021011122.

It is an interprime number because it is at equal distance from previous prime (221110120001) and next prime (221110120039).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 221110119978 and 221110120005.

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, 69502 + ... + 668618.

It is an arithmetic number, because the mean of its divisors is an integer number (12900208776).

Almost surely, 2^221110120020 is an apocalyptic number.

221110120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221110120020 is an abundant number, since it is smaller than the sum of its proper divisors (398099901228).

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

221110120020 is a wasteful number, since it uses less digits than its factorization.

221110120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605280 (or 605278 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221110120020 its reverse (20021011122), we get a palindrome (241131131142).

The spelling of 221110120020 in words is "two hundred twenty-one billion, one hundred ten million, one hundred twenty thousand, twenty".