1211222301012 has 18 divisors (see below), whose sum is σ = 3061700816538. Its totient is φ = 403740766992.

The previous prime is 1211222300987. The next prime is 1211222301083. The reversal of 1211222301012 is 2101032221121.

It can be written as a sum of positive squares in only one way, i.e., 1172447177616 + 38775123396 = 1082796^2 + 196914^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16822531923 + ... + 16822531994.

Almost surely, 2^{1211222301012} is an apocalyptic number.

1211222301012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211222301012 is an abundant number, since it is smaller than the sum of its proper divisors (1850478515526).

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

1211222301012 is a wasteful number, since it uses less digits than its factorization.

1211222301012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33645063927 (or 33645063922 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1211222301012 its reverse (2101032221121), we get a palindrome (3312254522133).

The spelling of 1211222301012 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, three hundred one thousand, twelve".