2101210020011 has 8 divisors (see below), whose sum is σ = 2118942730800. Its totient is φ = 2083514682240.

The previous prime is 2101210019977. The next prime is 2101210020031. The reversal of 2101210020011 is 1100200121012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101210020011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101210019974 and 2101210020001.

It is not an unprimeable number, because it can be changed into a prime (2101210020031) 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, 9230330 + ... + 9455231.

It is an arithmetic number, because the mean of its divisors is an integer number (264867841350).

Almost surely, 2^{2101210020011} is an apocalyptic number.

2101210020011 is a deficient number, since it is larger than the sum of its proper divisors (17732710789).

2101210020011 is a wasteful number, since it uses less digits than its factorization.

2101210020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18686509.

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

Adding to 2101210020011 its reverse (1100200121012), we get a palindrome (3201410141023).

The spelling of 2101210020011 in words is "two trillion, one hundred one billion, two hundred ten million, twenty thousand, eleven".