21222012011222 has 16 divisors (see below), whose sum is σ = 34741725135552. Its totient is φ = 9642258987720.

The previous prime is 21222012011171. The next prime is 21222012011231. The reversal of 21222012011222 is 22211021022212.

It is a junction number, because it is equal to n+sod(n) for n = 21222012011194 and 21222012011203.

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, 205452608 + ... + 205555875.

It is an arithmetic number, because the mean of its divisors is an integer number (2171357820972).

Almost surely, 2^{21222012011222} is an apocalyptic number.

21222012011222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21222012011222 is a deficient number, since it is larger than the sum of its proper divisors (13519713124330).

21222012011222 is a wasteful number, since it uses less digits than its factorization.

21222012011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411010843.

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

Adding to 21222012011222 its reverse (22211021022212), we get a palindrome (43433033033434).

The spelling of 21222012011222 in words is "twenty-one trillion, two hundred twenty-two billion, twelve million, eleven thousand, two hundred twenty-two".