221211010220 has 12 divisors (see below), whose sum is σ = 464543121504. Its totient is φ = 88484404080.

The previous prime is 221211010217. The next prime is 221211010249. The reversal of 221211010220 is 22010112122.

It is a super-2 number, since 2×221211010220² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221211010195 and 221211010204.

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, 5530275236 + ... + 5530275275.

It is an arithmetic number, because the mean of its divisors is an integer number (38711926792).

Almost surely, 2^221211010220 is an apocalyptic number.

221211010220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221211010220 is an abundant number, since it is smaller than the sum of its proper divisors (243332111284).

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

221211010220 is a wasteful number, since it uses less digits than its factorization.

221211010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11060550520 (or 11060550518 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221211010220 its reverse (22010112122), we get a palindrome (243221122342).

The spelling of 221211010220 in words is "two hundred twenty-one billion, two hundred eleven million, ten thousand, two hundred twenty".