1213122122311 has 16 divisors (see below), whose sum is σ = 1343228312448. Its totient is φ = 1086321376800.

The previous prime is 1213122122293. The next prime is 1213122122353. The reversal of 1213122122311 is 1132212213121.

It is a happy number.

It is not a de Polignac number, because 1213122122311 - 2⁵ = 1213122122279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213122129311) 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, 21295176 + ... + 21352066.

It is an arithmetic number, because the mean of its divisors is an integer number (83951769528).

Almost surely, 2^{1213122122311} is an apocalyptic number.

1213122122311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213122122311 is a deficient number, since it is larger than the sum of its proper divisors (130106190137).

1213122122311 is a wasteful number, since it uses less digits than its factorization.

1213122122311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85902.

The product of its digits is 288, while the sum is 22.

Adding to 1213122122311 its reverse (1132212213121), we get a palindrome (2345334335432).

The spelling of 1213122122311 in words is "one trillion, two hundred thirteen billion, one hundred twenty-two million, one hundred twenty-two thousand, three hundred eleven".