221102031202020 has 72 divisors (see below), whose sum is σ = 670677938671104. Its totient is φ = 58960385402688.

The previous prime is 221102031202001. The next prime is 221102031202033. The reversal of 221102031202020 is 20202130201122.

221102031202020 is a `hidden beast` number, since 22 + 110 + 20 + 312 + 0 + 202 + 0 = 666.

It is a super-2 number, since 2×221102031202020² (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 = 221102031201984 and 221102031202002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77006667 + ... + 79826253.

It is an arithmetic number, because the mean of its divisors is an integer number (9314971370432).

Almost surely, 2^{221102031202020} is an apocalyptic number.

221102031202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221102031202020 is an abundant number, since it is smaller than the sum of its proper divisors (449575907469084).

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

221102031202020 is a wasteful number, since it uses less digits than its factorization.

221102031202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3255249 (or 3255244 counting only the distinct ones).

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

Adding to 221102031202020 its reverse (20202130201122), we get a palindrome (241304161403142).

The spelling of 221102031202020 in words is "two hundred twenty-one trillion, one hundred two billion, thirty-one million, two hundred two thousand, twenty".