12021222012 has 24 divisors (see below), whose sum is σ = 28138011216. Its totient is φ = 3994432128.

The previous prime is 12021221999. The next prime is 12021222023. The reversal of 12021222012 is 21022212021.

It is a junction number, because it is equal to n+sod(n) for n = 12021221982 and 12021222000.

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, 1576273 + ... + 1583880.

It is an arithmetic number, because the mean of its divisors is an integer number (1172417134).

Almost surely, 2^12021222012 is an apocalyptic number.

12021222012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12021222012 is an abundant number, since it is smaller than the sum of its proper divisors (16116789204).

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

12021222012 is a wasteful number, since it uses less digits than its factorization.

12021222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160477 (or 3160475 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12021222012 its reverse (21022212021), we get a palindrome (33043434033).

Subtracting 12021222012 from its reverse (21022212021), we obtain a palindrome (9000990009).

The spelling of 12021222012 in words is "twelve billion, twenty-one million, two hundred twenty-two thousand, twelve".