12021211012112 has 80 divisors (see below), whose sum is σ = 24789699451440. Its totient is φ = 5627562737664.

The previous prime is 12021211012091. The next prime is 12021211012159. The reversal of 12021211012112 is 21121011212021.

It can be written as a sum of positive squares in 8 ways, for example, as 264294697216 + 11756916314896 = 514096^2 + 3428836^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 680347214 + ... + 680364882.

It is an arithmetic number, because the mean of its divisors is an integer number (309871243143).

Almost surely, 2^{12021211012112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12021211012112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12394849725720).

12021211012112 is an abundant number, since it is smaller than the sum of its proper divisors (12768488439328).

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

12021211012112 is a wasteful number, since it uses less digits than its factorization.

12021211012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30588 (or 30582 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12021211012112 its reverse (21121011212021), we get a palindrome (33142222224133).

The spelling of 12021211012112 in words is "twelve trillion, twenty-one billion, two hundred eleven million, twelve thousand, one hundred twelve".