1211323012310 has 32 divisors (see below), whose sum is σ = 2184193360800. Its totient is φ = 483682434048.

The previous prime is 1211323012261. The next prime is 1211323012313. The reversal of 1211323012310 is 132103231121.

It is a happy number.

It is a super-2 number, since 2×1211323012310² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211323012313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34741766 + ... + 34776614.

It is an arithmetic number, because the mean of its divisors is an integer number (68256042525).

Almost surely, 2^{1211323012310} is an apocalyptic number.

1211323012310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211323012310 is a deficient number, since it is larger than the sum of its proper divisors (972870348490).

1211323012310 is a wasteful number, since it uses less digits than its factorization.

1211323012310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40832.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1211323012310 its reverse (132103231121), we get a palindrome (1343426243431).

The spelling of 1211323012310 in words is "one trillion, two hundred eleven billion, three hundred twenty-three million, twelve thousand, three hundred ten".