2101287328020 has 72 divisors (see below), whose sum is σ = 6376549888800. Its totient is φ = 560110760640.

The previous prime is 2101287328013. The next prime is 2101287328027. The reversal of 2101287328020 is 208237821012.

It is an interprime number because it is at equal distance from previous prime (2101287328013) and next prime (2101287328027).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101287328027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1986970 + ... + 2854929.

It is an arithmetic number, because the mean of its divisors is an integer number (88563192900).

Almost surely, 2^{2101287328020} is an apocalyptic number.

2101287328020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101287328020 is an abundant number, since it is smaller than the sum of its proper divisors (4275262560780).

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

2101287328020 is a wasteful number, since it uses less digits than its factorization.

2101287328020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4844325 (or 4844320 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 2101287328020 in words is "two trillion, one hundred one billion, two hundred eighty-seven million, three hundred twenty-eight thousand, twenty".