1211231123012 has 24 divisors (see below), whose sum is σ = 2155670798400. Its totient is φ = 595326037856.

The previous prime is 1211231122967. The next prime is 1211231123051. The reversal of 1211231123012 is 2103211321121.

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, 6391658 + ... + 6578430.

It is an arithmetic number, because the mean of its divisors is an integer number (89819616600).

Almost surely, 2^{1211231123012} is an apocalyptic number.

It is an amenable number.

1211231123012 is a deficient number, since it is larger than the sum of its proper divisors (944439675388).

1211231123012 is a wasteful number, since it uses less digits than its factorization.

1211231123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214315 (or 214313 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1211231123012 its reverse (2103211321121), we get a palindrome (3314442444133).

The spelling of 1211231123012 in words is "one trillion, two hundred eleven billion, two hundred thirty-one million, one hundred twenty-three thousand, twelve".