21111201210222 has 12 divisors (see below), whose sum is σ = 45740935955520. Its totient is φ = 7037067070068.

The previous prime is 21111201210193. The next prime is 21111201210241. The reversal of 21111201210222 is 22201210211112.

21111201210222 is a `hidden beast` number, since 2 + 111 + 120 + 1 + 210 + 222 = 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: 1172844511679 = 21111201210222 / (2 + 1 + 1 + 1 + 1 + 2 + 0 + 1 + 2 + 1 + 0 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 21111201210195 and 21111201210204.

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, 586422255822 + ... + 586422255857.

It is an arithmetic number, because the mean of its divisors is an integer number (3811744662960).

Almost surely, 2^{21111201210222} is an apocalyptic number.

21111201210222 is an abundant number, since it is smaller than the sum of its proper divisors (24629734745298).

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

21111201210222 is a wasteful number, since it uses less digits than its factorization.

21111201210222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172844511687 (or 1172844511684 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21111201210222 its reverse (22201210211112), we get a palindrome (43312411421334).

The spelling of 21111201210222 in words is "twenty-one trillion, one hundred eleven billion, two hundred one million, two hundred ten thousand, two hundred twenty-two".