21000121120222 has 16 divisors (see below), whose sum is σ = 33409953223920. Its totient is φ = 9865574478208.

The previous prime is 21000121120169. The next prime is 21000121120243. The reversal of 21000121120222 is 22202112100012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21000121120196 and 21000121120205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526087897 + ... + 526127812.

It is an arithmetic number, because the mean of its divisors is an integer number (2088122076495).

Almost surely, 2^{21000121120222} is an apocalyptic number.

21000121120222 is a deficient number, since it is larger than the sum of its proper divisors (12409832103698).

21000121120222 is a wasteful number, since it uses less digits than its factorization.

21000121120222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052216315.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21000121120222 its reverse (22202112100012), we get a palindrome (43202233220234).

The spelling of 21000121120222 in words is "twenty-one trillion, one hundred twenty-one million, one hundred twenty thousand, two hundred twenty-two".