21000010211122 has 16 divisors (see below), whose sum is σ = 31514326553880. Its totient is φ = 10495235011968.

The previous prime is 21000010211119. The next prime is 21000010211143. The reversal of 21000010211122 is 22111201000012.

It can be written as a sum of positive squares in 4 ways, for example, as 20767060153921 + 232950057201 = 4557089^2 + 482649^2 .

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, 174131268 + ... + 174251824.

Almost surely, 2^{21000010211122} is an apocalyptic number.

21000010211122 is a deficient number, since it is larger than the sum of its proper divisors (10514316342758).

21000010211122 is a wasteful number, since it uses less digits than its factorization.

21000010211122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159405.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21000010211122 its reverse (22111201000012), we get a palindrome (43111211211134).

The spelling of 21000010211122 in words is "twenty-one trillion, ten million, two hundred eleven thousand, one hundred twenty-two".