2102120011020 has 24 divisors (see below), whose sum is σ = 5885936031024. Its totient is φ = 560565336256.

The previous prime is 2102120011003. The next prime is 2102120011027. The reversal of 2102120011020 is 201100212012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2102120010987 and 2102120011005.

It is not an unprimeable number, because it can be changed into a prime (2102120011027) 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, 17517666699 + ... + 17517666818.

It is an arithmetic number, because the mean of its divisors is an integer number (245247334626).

Almost surely, 2^{2102120011020} is an apocalyptic number.

2102120011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102120011020 is an abundant number, since it is smaller than the sum of its proper divisors (3783816020004).

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

2102120011020 is a wasteful number, since it uses less digits than its factorization.

2102120011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35035333529 (or 35035333527 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2102120011020 its reverse (201100212012), we get a palindrome (2303220223032).

The spelling of 2102120011020 in words is "two trillion, one hundred two billion, one hundred twenty million, eleven thousand, twenty".