1220510554140 has 96 divisors (see below), whose sum is σ = 3474258633216. Its totient is φ = 320059664640.

The previous prime is 1220510554139. The next prime is 1220510554163. The reversal of 1220510554140 is 414550150221.

It is a super-2 number, since 2×1220510554140² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1220510554098 and 1220510554107.

It is a congruent number.

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, 16737399 + ... + 16810161.

It is an arithmetic number, because the mean of its divisors is an integer number (36190194096).

Almost surely, 2^{1220510554140} is an apocalyptic number.

1220510554140 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 1220510554140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737129316608).

1220510554140 is an abundant number, since it is smaller than the sum of its proper divisors (2253748079076).

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

1220510554140 is a wasteful number, since it uses less digits than its factorization.

1220510554140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77419 (or 77417 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The spelling of 1220510554140 in words is "one trillion, two hundred twenty billion, five hundred ten million, five hundred fifty-four thousand, one hundred forty".