2187221694080 has 64 divisors (see below), whose sum is σ = 5370146565480. Its totient is φ = 851243028480.

The previous prime is 2187221694061. The next prime is 2187221694113. The reversal of 2187221694080 is 804961227812.

It can be written as a sum of positive squares in 4 ways, for example, as 2055231897664 + 131989796416 = 1433608^2 + 363304^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46159211 + ... + 46206570.

Almost surely, 2^{2187221694080} is an apocalyptic number.

2187221694080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2187221694080 is an abundant number, since it is smaller than the sum of its proper divisors (3182924871400).

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

2187221694080 is an equidigital number, since it uses as much as digits as its factorization.

2187221694080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92365837 (or 92365825 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 2187221694080 in words is "two trillion, one hundred eighty-seven billion, two hundred twenty-one million, six hundred ninety-four thousand, eighty".