1123121222311 has 16 divisors (see below), whose sum is σ = 1237270664448. Its totient is φ = 1010982139200.

The previous prime is 1123121222303. The next prime is 1123121222317. The reversal of 1123121222311 is 1132221213211.

It is a happy number.

It is not a de Polignac number, because 1123121222311 - 2³ = 1123121222303 is a prime.

It is a super-2 number, since 2×1123121222311² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123121222317) 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, 9869640 + ... + 9982786.

It is an arithmetic number, because the mean of its divisors is an integer number (77329416528).

Almost surely, 2^{1123121222311} is an apocalyptic number.

1123121222311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1123121222311 is a deficient number, since it is larger than the sum of its proper divisors (114149442137).

1123121222311 is a wasteful number, since it uses less digits than its factorization.

1123121222311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122022.

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

Adding to 1123121222311 its reverse (1132221213211), we get a palindrome (2255342435522).

The spelling of 1123121222311 in words is "one trillion, one hundred twenty-three billion, one hundred twenty-one million, two hundred twenty-two thousand, three hundred eleven".