2121010021133 has 16 divisors (see below), whose sum is σ = 2144447725680. Its totient is φ = 2097704534016.

The previous prime is 2121010021121. The next prime is 2121010021153. The reversal of 2121010021133 is 3311200101212.

It can be written as a sum of positive squares in 8 ways, for example, as 5273954884 + 2115736066249 = 72622^2 + 1454557^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121010021133 - 2³² = 2116715053837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121010021153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121769441 + ... + 121786857.

It is an arithmetic number, because the mean of its divisors is an integer number (134027982855).

Almost surely, 2^{2121010021133} is an apocalyptic number.

It is an amenable number.

2121010021133 is a deficient number, since it is larger than the sum of its proper divisors (23437704547).

2121010021133 is a wasteful number, since it uses less digits than its factorization.

2121010021133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21136.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 2121010021133 its reverse (3311200101212), we get a palindrome (5432210122345).

The spelling of 2121010021133 in words is "two trillion, one hundred twenty-one billion, ten million, twenty-one thousand, one hundred thirty-three".