221101240300020 has 72 divisors (see below), whose sum is σ = 670686828564480. Its totient is φ = 58959182059200.

The previous prime is 221101240300013. The next prime is 221101240300051. The reversal of 221101240300020 is 20003042101122.

It is a happy number.

221101240300020 is a `hidden beast` number, since 2 + 2 + 1 + 101 + 240 + 300 + 0 + 20 = 666.

It is a super-2 number, since 2×221101240300020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221101240299966 and 221101240300002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2680756 + ... + 21198795.

Almost surely, 2^{221101240300020} is an apocalyptic number.

221101240300020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221101240300020 is an abundant number, since it is smaller than the sum of its proper divisors (449585588264460).

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

221101240300020 is a wasteful number, since it uses less digits than its factorization.

221101240300020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23931005 (or 23931000 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 221101240300020 its reverse (20003042101122), we get a palindrome (241104282401142).

The spelling of 221101240300020 in words is "two hundred twenty-one trillion, one hundred one billion, two hundred forty million, three hundred thousand, twenty".