221020220120 has 64 divisors (see below), whose sum is σ = 586671206400. Its totient is φ = 73333895040.

The previous prime is 221020220093. The next prime is 221020220153. The reversal of 221020220120 is 21022020122.

It is a super-3 number, since 3×221020220120³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 221020220095 and 221020220104.

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, 12722900 + ... + 12740259.

It is an arithmetic number, because the mean of its divisors is an integer number (9166737600).

Almost surely, 2^221020220120 is an apocalyptic number.

221020220120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221020220120 is an abundant number, since it is smaller than the sum of its proper divisors (365650986280).

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

221020220120 is a wasteful number, since it uses less digits than its factorization.

221020220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25463208 (or 25463204 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221020220120 its reverse (21022020122), we get a palindrome (242042240242).

It can be divided in two parts, 2210202 and 20120, that added together give a palindrome (2230322).

The spelling of 221020220120 in words is "two hundred twenty-one billion, twenty million, two hundred twenty thousand, one hundred twenty".