221012020220 has 12 divisors (see below), whose sum is σ = 464125242504. Its totient is φ = 88404808080.

The previous prime is 221012020171. The next prime is 221012020237. The reversal of 221012020220 is 22020210122.

It is a junction number, because it is equal to n+sod(n) for n = 221012020195 and 221012020204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5525300486 + ... + 5525300525.

It is an arithmetic number, because the mean of its divisors is an integer number (38677103542).

Almost surely, 2^221012020220 is an apocalyptic number.

221012020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221012020220 is an abundant number, since it is smaller than the sum of its proper divisors (243113222284).

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

221012020220 is a wasteful number, since it uses less digits than its factorization.

221012020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11050601020 (or 11050601018 counting only the distinct ones).

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

Adding to 221012020220 its reverse (22020210122), we get a palindrome (243032230342).

The spelling of 221012020220 in words is "two hundred twenty-one billion, twelve million, twenty thousand, two hundred twenty".