12122012221012 has 6 divisors (see below), whose sum is σ = 21213521386778. Its totient is φ = 6061006110504.

The previous prime is 12122012220943. The next prime is 12122012221013. The reversal of 12122012221012 is 21012221022121.

It can be written as a sum of positive squares in only one way, i.e., 7611672673476 + 4510339547536 = 2758926^2 + 2123756^2 .

It is a super-2 number, since 2×12122012221012² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122012221013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1515251527623 + ... + 1515251527630.

Almost surely, 2^{12122012221012} is an apocalyptic number.

It is an amenable number.

12122012221012 is a deficient number, since it is larger than the sum of its proper divisors (9091509165766).

12122012221012 is a wasteful number, since it uses less digits than its factorization.

12122012221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030503055257 (or 3030503055255 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12122012221012 its reverse (21012221022121), we get a palindrome (33134233243133).

The spelling of 12122012221012 in words is "twelve trillion, one hundred twenty-two billion, twelve million, two hundred twenty-one thousand, twelve".