1211312031310 has 32 divisors (see below), whose sum is σ = 2255640566400. Its totient is φ = 467797559040.

The previous prime is 1211312031301. The next prime is 1211312031323. The reversal of 1211312031310 is 131302131121.

It is a super-2 number, since 2×1211312031310² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8258715 + ... + 8404105.

It is an arithmetic number, because the mean of its divisors is an integer number (70488767700).

Almost surely, 2^{1211312031310} is an apocalyptic number.

1211312031310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211312031310 is a deficient number, since it is larger than the sum of its proper divisors (1044328535090).

1211312031310 is a wasteful number, since it uses less digits than its factorization.

1211312031310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174156.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1211312031310 its reverse (131302131121), we get a palindrome (1342614162431).

The spelling of 1211312031310 in words is "one trillion, two hundred eleven billion, three hundred twelve million, thirty-one thousand, three hundred ten".