1211231102012 has 12 divisors (see below), whose sum is σ = 2120041901376. Its totient is φ = 605504844480.

The previous prime is 1211231101991. The next prime is 1211231102033. The reversal of 1211231102012 is 2102011321121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1211231101991) and next prime (1211231102033).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27652013 + ... + 27695780.

It is an arithmetic number, because the mean of its divisors is an integer number (176670158448).

Almost surely, 2^{1211231102012} is an apocalyptic number.

It is an amenable number.

1211231102012 is a deficient number, since it is larger than the sum of its proper divisors (908810799364).

1211231102012 is a wasteful number, since it uses less digits than its factorization.

1211231102012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55353268 (or 55353266 counting only the distinct ones).

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

Adding to 1211231102012 its reverse (2102011321121), we get a palindrome (3313242423133).

The spelling of 1211231102012 in words is "one trillion, two hundred eleven billion, two hundred thirty-one million, one hundred two thousand, twelve".