12221121022220 has 48 divisors (see below), whose sum is σ = 27998797726368. Its totient is φ = 4443834408960.

The previous prime is 12221121022219. The next prime is 12221121022267. The reversal of 12221121022220 is 2222012112221.

12221121022220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12221121022192 and 12221121022201.

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, 3403634 + ... + 6002246.

It is an arithmetic number, because the mean of its divisors is an integer number (583308285966).

Almost surely, 2^{12221121022220} is an apocalyptic number.

12221121022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221121022220 is an abundant number, since it is smaller than the sum of its proper divisors (15777676704148).

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

12221121022220 is a wasteful number, since it uses less digits than its factorization.

12221121022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620010 (or 2620008 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12221121022220 its reverse (2222012112221), we get a palindrome (14443133134441).

The spelling of 12221121022220 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, twenty-two thousand, two hundred twenty".