221110120012020 has 96 divisors (see below), whose sum is σ = 621450472406400. Its totient is φ = 58740004667904.

The previous prime is 221110120011961. The next prime is 221110120012037. The reversal of 221110120012020 is 20210021011122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13574586 + ... + 25029774.

It is an arithmetic number, because the mean of its divisors is an integer number (6473442420900).

Almost surely, 2^{221110120012020} is an apocalyptic number.

221110120012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221110120012020 is an abundant number, since it is smaller than the sum of its proper divisors (400340352394380).

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

221110120012020 is a wasteful number, since it uses less digits than its factorization.

221110120012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11456417 (or 11456415 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221110120012020 its reverse (20210021011122), we get a palindrome (241320141023142).

The spelling of 221110120012020 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred twenty million, twelve thousand, twenty".