2111345155520 has 112 divisors (see below), whose sum is σ = 5089421762208. Its totient is φ = 834164981760.

The previous prime is 2111345155477. The next prime is 2111345155531. The reversal of 2111345155520 is 255515431112.

It is a congruent number.

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, 168941912 + ... + 168954408.

It is an arithmetic number, because the mean of its divisors is an integer number (45441265734).

Almost surely, 2^{2111345155520} is an apocalyptic number.

2111345155520 is a gapful number since it is divisible by the number (20) 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 2111345155520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2544710881104).

2111345155520 is an abundant number, since it is smaller than the sum of its proper divisors (2978076606688).

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

2111345155520 is a wasteful number, since it uses less digits than its factorization.

2111345155520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18958 (or 18948 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 35.

The spelling of 2111345155520 in words is "two trillion, one hundred eleven billion, three hundred forty-five million, one hundred fifty-five thousand, five hundred twenty".