21120120212222 has 32 divisors (see below), whose sum is σ = 32904895161600. Its totient is φ = 10154785838848.

The previous prime is 21120120212221. The next prime is 21120120212231. The reversal of 21120120212222 is 22221202102112.

It is a junction number, because it is equal to n+sod(n) for n = 21120120212194 and 21120120212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120120212221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49197818 + ... + 49625250.

It is an arithmetic number, because the mean of its divisors is an integer number (1028277973800).

Almost surely, 2^{21120120212222} is an apocalyptic number.

21120120212222 is a deficient number, since it is larger than the sum of its proper divisors (11784774949378).

21120120212222 is a wasteful number, since it uses less digits than its factorization.

21120120212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430900.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21120120212222 its reverse (22221202102112), we get a palindrome (43341322314334).

The spelling of 21120120212222 in words is "twenty-one trillion, one hundred twenty billion, one hundred twenty million, two hundred twelve thousand, two hundred twenty-two".