1220021200332 has 144 divisors (see below), whose sum is σ = 3396278549664. Its totient is φ = 366201216000.

The previous prime is 1220021200319. The next prime is 1220021200339. The reversal of 1220021200332 is 2330021200221.

1220021200332 is a `hidden beast` number, since 12 + 200 + 2 + 120 + 0 + 332 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1220021200339) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24985782 + ... + 25034562.

It is an arithmetic number, because the mean of its divisors is an integer number (23585267706).

Almost surely, 2^{1220021200332} is an apocalyptic number.

1220021200332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220021200332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1698139274832).

1220021200332 is an abundant number, since it is smaller than the sum of its proper divisors (2176257349332).

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

1220021200332 is a wasteful number, since it uses less digits than its factorization.

1220021200332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49400 (or 49395 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 1220021200332 its reverse (2330021200221), we get a palindrome (3550042400553).

The spelling of 1220021200332 in words is "one trillion, two hundred twenty billion, twenty-one million, two hundred thousand, three hundred thirty-two".