21312222032222 has 24 divisors (see below), whose sum is σ = 35139009886848. Its totient is φ = 9687300967520.

The previous prime is 21312222032209. The next prime is 21312222032237. The reversal of 21312222032222 is 22223022221312.

It is a super-3 number, since 3×21312222032222³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21312222032191 and 21312222032200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44575043 + ... + 45050625.

It is an arithmetic number, because the mean of its divisors is an integer number (1464125411952).

Almost surely, 2^{21312222032222} is an apocalyptic number.

21312222032222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21312222032222 is a deficient number, since it is larger than the sum of its proper divisors (13826787854626).

21312222032222 is a wasteful number, since it uses less digits than its factorization.

21312222032222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660784 (or 660773 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21312222032222 its reverse (22223022221312), we get a palindrome (43535244253534).

The spelling of 21312222032222 in words is "twenty-one trillion, three hundred twelve billion, two hundred twenty-two million, thirty-two thousand, two hundred twenty-two".