20021120121222 has 24 divisors (see below), whose sum is σ = 47322647559720. Its totient is φ = 6067006097280.

The previous prime is 20021120121203. The next prime is 20021120121293. The reversal of 20021120121222 is 22212102112002.

It is a happy number.

20021120121222 is a `hidden beast` number, since 20 + 0 + 211 + 201 + 212 + 22 = 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 = 20021120121195 and 20021120121204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50558383947 + ... + 50558384342.

It is an arithmetic number, because the mean of its divisors is an integer number (1971776981655).

Almost surely, 2^{20021120121222} is an apocalyptic number.

20021120121222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20021120121222 is an abundant number, since it is smaller than the sum of its proper divisors (27301527438498).

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

20021120121222 is a wasteful number, since it uses less digits than its factorization.

20021120121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101116768308 (or 101116768305 counting only the distinct ones).

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

Adding to 20021120121222 its reverse (22212102112002), we get a palindrome (42233222233224).

The spelling of 20021120121222 in words is "twenty trillion, twenty-one billion, one hundred twenty million, one hundred twenty-one thousand, two hundred twenty-two".