20111210121222 has 96 divisors (see below), whose sum is σ = 47633913699840. Its totient is φ = 6081713280000.

The previous prime is 20111210121203. The next prime is 20111210121287. The reversal of 20111210121222 is 22212101211102.

20111210121222 is a `hidden beast` number, since 2 + 0 + 111 + 210 + 121 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20111210121195 and 20111210121204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 187549222 + ... + 187656422.

It is an arithmetic number, because the mean of its divisors is an integer number (496186601040).

Almost surely, 2^{20111210121222} is an apocalyptic number.

20111210121222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20111210121222 is an abundant number, since it is smaller than the sum of its proper divisors (27522703578618).

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

20111210121222 is a wasteful number, since it uses less digits than its factorization.

20111210121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109170 (or 109167 counting only the distinct ones).

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

Adding to 20111210121222 its reverse (22212101211102), we get a palindrome (42323311332324).

The spelling of 20111210121222 in words is "twenty trillion, one hundred eleven billion, two hundred ten million, one hundred twenty-one thousand, two hundred twenty-two".