2102100012020 has 24 divisors (see below), whose sum is σ = 4414462209024. Its totient is φ = 840830065056.

The previous prime is 2102100011989. The next prime is 2102100012053. The reversal of 2102100012020 is 202100012012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2102100011992 and 2102100012010.

It is a congruent number.

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, 1250477 + ... + 2401643.

It is an arithmetic number, because the mean of its divisors is an integer number (183935925376).

Almost surely, 2^{2102100012020} is an apocalyptic number.

2102100012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102100012020 is an abundant number, since it is smaller than the sum of its proper divisors (2312362197004).

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

2102100012020 is a wasteful number, since it uses less digits than its factorization.

2102100012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242479 (or 1242477 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2102100012020 its reverse (202100012012), we get a palindrome (2304200024032).

The spelling of 2102100012020 in words is "two trillion, one hundred two billion, one hundred million, twelve thousand, twenty".