2102021121020 has 24 divisors (see below), whose sum is σ = 4646573005200. Its totient is φ = 796555372032.

The previous prime is 2102021120929. The next prime is 2102021121023. The reversal of 2102021121020 is 201211202012.

It is a junction number, because it is equal to n+sod(n) for n = 2102021120986 and 2102021121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102021121023) 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, 2765816885 + ... + 2765817644.

It is an arithmetic number, because the mean of its divisors is an integer number (193607208550).

Almost surely, 2^{2102021121020} is an apocalyptic number.

2102021121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102021121020 is an abundant number, since it is smaller than the sum of its proper divisors (2544551884180).

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

2102021121020 is a wasteful number, since it uses less digits than its factorization.

2102021121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5531634557 (or 5531634555 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2102021121020 its reverse (201211202012), we get a palindrome (2303232323032).

The spelling of 2102021121020 in words is "two trillion, one hundred two billion, twenty-one million, one hundred twenty-one thousand, twenty".