2101121310720 has 112 divisors (see below), whose sum is σ = 6723178212240. Its totient is φ = 560298983424.

The previous prime is 2101121310719. The next prime is 2101121310727. The reversal of 2101121310720 is 270131211012.

It is a super-3 number, since 3×2101121310720³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101121310727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8426605 + ... + 8672364.

It is an arithmetic number, because the mean of its divisors is an integer number (60028376895).

Almost surely, 2^{2101121310720} is an apocalyptic number.

2101121310720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101121310720 is an abundant number, since it is smaller than the sum of its proper divisors (4622056901520).

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

2101121310720 is an equidigital number, since it uses as much as digits as its factorization.

2101121310720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17099003 (or 17098979 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 21.

Adding to 2101121310720 its reverse (270131211012), we get a palindrome (2371252521732).

The spelling of 2101121310720 in words is "two trillion, one hundred one billion, one hundred twenty-one million, three hundred ten thousand, seven hundred twenty".