21211211011122 has 48 divisors (see below), whose sum is σ = 51752866763520. Its totient is φ = 6220296482400.

The previous prime is 21211211011093. The next prime is 21211211011139. The reversal of 21211211011122 is 22111011211212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21211211011095 and 21211211011104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1727853997 + ... + 1727866272.

It is an arithmetic number, because the mean of its divisors is an integer number (1078184724240).

Almost surely, 2^{21211211011122} is an apocalyptic number.

21211211011122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21211211011122 is an abundant number, since it is smaller than the sum of its proper divisors (30541655752398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21211211011122 is a wasteful number, since it uses less digits than its factorization.

21211211011122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455720319 (or 3455720316 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 21211211011122 its reverse (22111011211212), we get a palindrome (43322222222334).

The spelling of 21211211011122 in words is "twenty-one trillion, two hundred eleven billion, two hundred eleven million, eleven thousand, one hundred twenty-two".