20022001221222 has 192 divisors, whose sum is σ = 60403075858944. Its totient is φ = 4800479696640.

The previous prime is 20022001221139. The next prime is 20022001221269. The reversal of 20022001221222 is 22212210022002.

20022001221222 is a `hidden beast` number, since 2 + 0 + 0 + 220 + 0 + 1 + 221 + 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 = 20022001221195 and 20022001221204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20091703 + ... + 21064674.

It is an arithmetic number, because the mean of its divisors is an integer number (314599353432).

Almost surely, 2^{20022001221222} is an apocalyptic number.

20022001221222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20022001221222 is an abundant number, since it is smaller than the sum of its proper divisors (40381074637722).

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

20022001221222 is a wasteful number, since it uses less digits than its factorization.

20022001221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41156425 (or 41156413 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20022001221222 its reverse (22212210022002), we get a palindrome (42234211243224).

The spelling of 20022001221222 in words is "twenty trillion, twenty-two billion, one million, two hundred twenty-one thousand, two hundred twenty-two".