1220002122120 has 256 divisors, whose sum is σ = 3832491801600. Its totient is φ = 310366371840.

The previous prime is 1220002122103. The next prime is 1220002122137. The reversal of 1220002122120 is 212212000221.

It is an interprime number because it is at equal distance from previous prime (1220002122103) and next prime (1220002122137).

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 1220002122120.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 410911996 + ... + 410914964.

It is an arithmetic number, because the mean of its divisors is an integer number (14970671100).

Almost surely, 2^{1220002122120} is an apocalyptic number.

1220002122120 is a gapful number since it is divisible by the number (10) 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 1220002122120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1916245900800).

1220002122120 is an abundant number, since it is smaller than the sum of its proper divisors (2612489679480).

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

1220002122120 is a wasteful number, since it uses less digits than its factorization.

1220002122120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4848 (or 4844 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220002122120 its reverse (212212000221), we get a palindrome (1432214122341).

The spelling of 1220002122120 in words is "one trillion, two hundred twenty billion, two million, one hundred twenty-two thousand, one hundred twenty".