12221000121220 has 48 divisors (see below), whose sum is σ = 28010999822400. Its totient is φ = 4441809640320.

The previous prime is 12221000121181. The next prime is 12221000121277. The reversal of 12221000121220 is 2212100012221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12221000121194 and 12221000121203.

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, 13242630 + ... + 14135389.

It is an arithmetic number, because the mean of its divisors is an integer number (583562496300).

Almost surely, 2^{12221000121220} is an apocalyptic number.

12221000121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221000121220 is an abundant number, since it is smaller than the sum of its proper divisors (15789999701180).

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

12221000121220 is a wasteful number, since it uses less digits than its factorization.

12221000121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27380068 (or 27380066 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12221000121220 its reverse (2212100012221), we get a palindrome (14433100133441).

The spelling of 12221000121220 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty-one thousand, two hundred twenty".