21222211115346 has 32 divisors (see below), whose sum is σ = 44311095014400. Its totient is φ = 6763253562384.

The previous prime is 21222211115317. The next prime is 21222211115351. The reversal of 21222211115346 is 64351111222212.

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 15 ways as a sum of consecutive naturals, for example, 36626646 + ... + 37201553.

It is an arithmetic number, because the mean of its divisors is an integer number (1384721719200).

Almost surely, 2^{21222211115346} is an apocalyptic number.

21222211115346 is an abundant number, since it is smaller than the sum of its proper divisors (23088883899054).

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

21222211115346 is a wasteful number, since it uses less digits than its factorization.

21222211115346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73830310.

The product of its digits is 11520, while the sum is 33.

Adding to 21222211115346 its reverse (64351111222212), we get a palindrome (85573322337558).

The spelling of 21222211115346 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, one hundred fifteen thousand, three hundred forty-six".