2100010111020 has 48 divisors (see below), whose sum is σ = 6533364791520. Its totient is φ = 560002696128.

The previous prime is 2100010110973. The next prime is 2100010111091. The reversal of 2100010111020 is 201110100012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2100010110993 and 2100010111011.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1944453267 + ... + 1944454346.

It is an arithmetic number, because the mean of its divisors is an integer number (136111766490).

Almost surely, 2^{2100010111020} is an apocalyptic number.

2100010111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100010111020 is an abundant number, since it is smaller than the sum of its proper divisors (4433354680500).

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

2100010111020 is a wasteful number, since it uses less digits than its factorization.

2100010111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888907631 (or 3888907623 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 2100010111020 its reverse (201110100012), we get a palindrome (2301120211032).

The spelling of 2100010111020 in words is "two trillion, one hundred billion, ten million, one hundred eleven thousand, twenty".