2102211020021 has 16 divisors (see below), whose sum is σ = 2453705908224. Its totient is φ = 1763512809264.

The previous prime is 2102211019991. The next prime is 2102211020053. The reversal of 2102211020021 is 1200201122012.

It is a cyclic number.

It is not a de Polignac number, because 2102211020021 - 2¹⁸ = 2102210757877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102211019978 and 2102211020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102211020071) 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, 25279316 + ... + 25362338.

It is an arithmetic number, because the mean of its divisors is an integer number (153356619264).

Almost surely, 2^{2102211020021} is an apocalyptic number.

It is an amenable number.

2102211020021 is a deficient number, since it is larger than the sum of its proper divisors (351494888203).

2102211020021 is an equidigital number, since it uses as much as digits as its factorization.

2102211020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160040.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2102211020021 its reverse (1200201122012), we get a palindrome (3302412142033).

The spelling of 2102211020021 in words is "two trillion, one hundred two billion, two hundred eleven million, twenty thousand, twenty-one".