21011011122 has 8 divisors (see below), whose sum is σ = 42022022256. Its totient is φ = 7003670372.

The previous prime is 21011011111. The next prime is 21011011139. The reversal of 21011011122 is 22111011012.

It is a sphenic number, since it is the product of 3 distinct primes.

21011011122 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21011011098 and 21011011107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1750917588 + ... + 1750917599.

It is an arithmetic number, because the mean of its divisors is an integer number (5252752782).

Almost surely, 2^21011011122 is an apocalyptic number.

21011011122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21011011122 is a wasteful number, since it uses less digits than its factorization.

21011011122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3501835192.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21011011122 its reverse (22111011012), we get a palindrome (43122022134).

The spelling of 21011011122 in words is "twenty-one billion, eleven million, eleven thousand, one hundred twenty-two".