1211131330312 has 8 divisors (see below), whose sum is σ = 2270871244350. Its totient is φ = 605565665152.

The previous prime is 1211131330303. The next prime is 1211131330349. The reversal of 1211131330312 is 2130331311121.

It can be written as a sum of positive squares in only one way, i.e., 1102907437636 + 108223892676 = 1050194^2 + 328974^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×1211131330312³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75695708137 + ... + 75695708152.

Almost surely, 2^{1211131330312} is an apocalyptic number.

It is an amenable number.

1211131330312 is a deficient number, since it is larger than the sum of its proper divisors (1059739914038).

1211131330312 is a wasteful number, since it uses less digits than its factorization.

1211131330312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151391416295 (or 151391416291 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1211131330312 its reverse (2130331311121), we get a palindrome (3341462641433).

The spelling of 1211131330312 in words is "one trillion, two hundred eleven billion, one hundred thirty-one million, three hundred thirty thousand, three hundred twelve".