2100120021011 has 8 divisors (see below), whose sum is σ = 2172555184800. Its totient is φ = 2027686006080.

The previous prime is 2100120021007. The next prime is 2100120021019. The reversal of 2100120021011 is 1101200210012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2100120021011 - 2² = 2100120021007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100120020983 and 2100120021001.

It is not an unprimeable number, because it can be changed into a prime (2100120021019) 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, 5225495 + ... + 5613023.

It is an arithmetic number, because the mean of its divisors is an integer number (271569398100).

Almost surely, 2^{2100120021011} is an apocalyptic number.

2100120021011 is a deficient number, since it is larger than the sum of its proper divisors (72435163789).

2100120021011 is a wasteful number, since it uses less digits than its factorization.

2100120021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574429.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2100120021011 its reverse (1101200210012), we get a palindrome (3201320231023).

The spelling of 2100120021011 in words is "two trillion, one hundred billion, one hundred twenty million, twenty-one thousand, eleven".