21012111011122 has 64 divisors (see below), whose sum is σ = 42492121952256. Its totient is φ = 7541040072960.

The previous prime is 21012111011093. The next prime is 21012111011123. The reversal of 21012111011122 is 22111011121012.

It is a junction number, because it is equal to n+sod(n) for n = 21012111011096 and 21012111011105.

It is not an unprimeable number, because it can be changed into a prime (21012111011123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85260108 + ... + 85506199.

It is an arithmetic number, because the mean of its divisors is an integer number (663939405504).

Almost surely, 2^{21012111011122} is an apocalyptic number.

21012111011122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21012111011122 is an abundant number, since it is smaller than the sum of its proper divisors (21480010941134).

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

21012111011122 is a wasteful number, since it uses less digits than its factorization.

21012111011122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170766391.

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

Adding to 21012111011122 its reverse (22111011121012), we get a palindrome (43123122132134).

The spelling of 21012111011122 in words is "twenty-one trillion, twelve billion, one hundred eleven million, eleven thousand, one hundred twenty-two".