12222100122221 has 32 divisors (see below), whose sum is σ = 14515202612736. Its totient is φ = 10164704256000.

The previous prime is 12222100122163. The next prime is 12222100122263.

12222100122221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12222100122221 - 2³⁴ = 12204920253037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12222100122193 and 12222100122202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222100121221) 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, 863420 + ... + 5018933.

It is an arithmetic number, because the mean of its divisors is an integer number (453600081648).

Almost surely, 2^{12222100122221} is an apocalyptic number.

12222100122221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12222100122221 is a deficient number, since it is larger than the sum of its proper divisors (2293102490515).

12222100122221 is a wasteful number, since it uses less digits than its factorization.

12222100122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5882693.

The product of its (nonzero) digits is 256, while the sum is 20.

It can be divided in two parts, 12222100 and 122221, that multiplied together give a square (1493797284100 = 1222210²).

The spelling of 12222100122221 in words is "twelve trillion, two hundred twenty-two billion, one hundred million, one hundred twenty-two thousand, two hundred twenty-one".