21000010022210 has 16 divisors (see below), whose sum is σ = 37800086124600. Its totient is φ = 8399988878976.

The previous prime is 21000010022197. The next prime is 21000010022279. The reversal of 21000010022210 is 1222001000012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18189227003689 + 2810783018521 = 4264883^2 + 1676539^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21000010022191 and 21000010022200.

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, 5206856 + ... + 8313324.

Almost surely, 2^{21000010022210} is an apocalyptic number.

21000010022210 is a deficient number, since it is larger than the sum of its proper divisors (16800076102390).

21000010022210 is a wasteful number, since it uses less digits than its factorization.

21000010022210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3782485.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21000010022210 its reverse (1222001000012), we get a palindrome (22222011022222).

The spelling of 21000010022210 in words is "twenty-one trillion, ten million, twenty-two thousand, two hundred ten".