21222311221112 has 32 divisors (see below), whose sum is σ = 41375261877120. Its totient is φ = 10193905067520.

The previous prime is 21222311221099. The next prime is 21222311221127. The reversal of 21222311221112 is 21112211322212.

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, 312279293 + ... + 312347244.

It is an arithmetic number, because the mean of its divisors is an integer number (1292976933660).

Almost surely, 2^{21222311221112} is an apocalyptic number.

It is an amenable number.

21222311221112 is a deficient number, since it is larger than the sum of its proper divisors (20152950656008).

21222311221112 is a wasteful number, since it uses less digits than its factorization.

21222311221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624626711 (or 624626707 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

Adding to 21222311221112 its reverse (21112211322212), we get a palindrome (42334522543324).

The spelling of 21222311221112 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred eleven million, two hundred twenty-one thousand, one hundred twelve".