2126355021880 has 128 divisors (see below), whose sum is σ = 5055017103360. Its totient is φ = 803924352000.

The previous prime is 2126355021859. The next prime is 2126355021899. The reversal of 2126355021880 is 881205536212.

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, 9307420 + ... + 9533140.

It is an arithmetic number, because the mean of its divisors is an integer number (39492321120).

Almost surely, 2^{2126355021880} is an apocalyptic number.

2126355021880 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 2126355021880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2527508551680).

2126355021880 is an abundant number, since it is smaller than the sum of its proper divisors (2928662081480).

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

2126355021880 is a wasteful number, since it uses less digits than its factorization.

2126355021880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225941 (or 225937 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 2126355021880 in words is "two trillion, one hundred twenty-six billion, three hundred fifty-five million, twenty-one thousand, eight hundred eighty".