221212021100022 has 12 divisors (see below), whose sum is σ = 479292712383420. Its totient is φ = 73737340366668.

The previous prime is 221212021099999. The next prime is 221212021100053. The reversal of 221212021100022 is 220001120212122.

It is a happy number.

221212021100022 is a `hidden beast` number, since 221 + 212 + 0 + 211 + 0 + 0 + 0 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 12289556727779 = 221212021100022 / (2 + 2 + 1 + 2 + 1 + 2 + 0 + 2 + 1 + 1 + 0 + 0 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 221212021099968 and 221212021100004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6144778363872 + ... + 6144778363907.

It is an arithmetic number, because the mean of its divisors is an integer number (39941059365285).

Almost surely, 2^{221212021100022} is an apocalyptic number.

221212021100022 is an abundant number, since it is smaller than the sum of its proper divisors (258080691283398).

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

221212021100022 is a wasteful number, since it uses less digits than its factorization.

221212021100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12289556727787 (or 12289556727784 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221212021100022 its reverse (220001120212122), we get a palindrome (441213141312144).

The spelling of 221212021100022 in words is "two hundred twenty-one trillion, two hundred twelve billion, twenty-one million, one hundred thousand, twenty-two".