12120221021220 has 96 divisors (see below), whose sum is σ = 40607920026240. Its totient is φ = 2983439018880.

The previous prime is 12120221021197. The next prime is 12120221021269. The reversal of 12120221021220 is 2212012202121.

It is a happy number.

12120221021220 is a `hidden beast` number, since 1 + 21 + 202 + 210 + 212 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12120221021193 and 12120221021202.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 863256586 + ... + 863270625.

It is an arithmetic number, because the mean of its divisors is an integer number (422999166940).

Almost surely, 2^{12120221021220} is an apocalyptic number.

12120221021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120221021220 is an abundant number, since it is smaller than the sum of its proper divisors (28487699005020).

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

12120221021220 is a wasteful number, since it uses less digits than its factorization.

12120221021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726527242 (or 1726527234 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12120221021220 its reverse (2212012202121), we get a palindrome (14332233223341).

The spelling of 12120221021220 in words is "twelve trillion, one hundred twenty billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty".