12211010021220 has 24 divisors (see below), whose sum is σ = 34190828059584. Its totient is φ = 3256269338976.

The previous prime is 12211010021179. The next prime is 12211010021281. The reversal of 12211010021220 is 2212001011221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12211010021220.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101758416784 + ... + 101758416903.

It is an arithmetic number, because the mean of its divisors is an integer number (1424617835816).

Almost surely, 2^{12211010021220} is an apocalyptic number.

12211010021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211010021220 is an abundant number, since it is smaller than the sum of its proper divisors (21979818038364).

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

12211010021220 is a wasteful number, since it uses less digits than its factorization.

12211010021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203516833699 (or 203516833697 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12211010021220 its reverse (2212001011221), we get a palindrome (14423011032441).

Subtracting from 12211010021220 its reverse (2212001011221), we obtain a palindrome (9999009009999).

The spelling of 12211010021220 in words is "twelve trillion, two hundred eleven billion, ten million, twenty-one thousand, two hundred twenty".