1211232101012 has 24 divisors (see below), whose sum is σ = 2231373661440. Its totient is φ = 573701244480.

The previous prime is 1211232100999. The next prime is 1211232101089. The reversal of 1211232101012 is 2101012321121.

It is a happy number.

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, 544568 + ... + 1648944.

It is an arithmetic number, because the mean of its divisors is an integer number (92973902560).

Almost surely, 2^{1211232101012} is an apocalyptic number.

It is an amenable number.

1211232101012 is a deficient number, since it is larger than the sum of its proper divisors (1020141560428).

1211232101012 is a wasteful number, since it uses less digits than its factorization.

1211232101012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118831 (or 1118829 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1211232101012 its reverse (2101012321121), we get a palindrome (3312244422133).

The spelling of 1211232101012 in words is "one trillion, two hundred eleven billion, two hundred thirty-two million, one hundred one thousand, twelve".