21021120010222 has 16 divisors (see below), whose sum is σ = 31605643117440. Its totient is φ = 10485920553912.

The previous prime is 21021120010199. The next prime is 21021120010243. The reversal of 21021120010222 is 22201002112012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21021120010196 and 21021120010205.

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, 907572 + ... + 6547207.

It is an arithmetic number, because the mean of its divisors is an integer number (1975352694840).

Almost surely, 2^{21021120010222} is an apocalyptic number.

21021120010222 is a deficient number, since it is larger than the sum of its proper divisors (10584523107218).

21021120010222 is a wasteful number, since it uses less digits than its factorization.

21021120010222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7458087.

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

Adding to 21021120010222 its reverse (22201002112012), we get a palindrome (43222122122234).

The spelling of 21021120010222 in words is "twenty-one trillion, twenty-one billion, one hundred twenty million, ten thousand, two hundred twenty-two".