2021206126 has 16 divisors (see below), whose sum is σ = 3211456896. Its totient is φ = 950768896.

The previous prime is 2021206097. The next prime is 2021206171. The reversal of 2021206126 is 6216021202.

It is a junction number, because it is equal to n+sod(n) for n = 2021206097 and 2021206106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83715 + ... + 105121.

It is an arithmetic number, because the mean of its divisors is an integer number (200716056).

Almost surely, 2^2021206126 is an apocalyptic number.

2021206126 is a deficient number, since it is larger than the sum of its proper divisors (1190250770).

2021206126 is a wasteful number, since it uses less digits than its factorization.

2021206126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24203.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 2021206126 is about 44957.8260817847. The cubic root of 2021206126 is about 1264.3584108700.

Adding to 2021206126 its reverse (6216021202), we get a palindrome (8237227328).

The spelling of 2021206126 in words is "two billion, twenty-one million, two hundred six thousand, one hundred twenty-six".