21011211122 has 16 divisors (see below), whose sum is σ = 34895148192. Its totient is φ = 9408004320.

The previous prime is 21011211103. The next prime is 21011211187. The reversal of 21011211122 is 22111211012.

It is a junction number, because it is equal to n+sod(n) for n = 21011211097 and 21011211106.

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, 7125803 + ... + 7128750.

It is an arithmetic number, because the mean of its divisors is an integer number (2180946762).

Almost surely, 2^21011211122 is an apocalyptic number.

21011211122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21011211122 is a deficient number, since it is larger than the sum of its proper divisors (13883937070).

21011211122 is a wasteful number, since it uses less digits than its factorization.

21011211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14254633.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21011211122 its reverse (22111211012), we get a palindrome (43122422134).

The spelling of 21011211122 in words is "twenty-one billion, eleven million, two hundred eleven thousand, one hundred twenty-two".