1121212223391 has 16 divisors (see below), whose sum is σ = 1610708520960. Its totient is φ = 689649853920.

The previous prime is 1121212223389. The next prime is 1121212223393. The reversal of 1121212223391 is 1933222121211.

It is an interprime number because it is at equal distance from previous prime (1121212223389) and next prime (1121212223393).

It is not a de Polignac number, because 1121212223391 - 2¹ = 1121212223389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121212223393) 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, 6727011 + ... + 6891668.

It is an arithmetic number, because the mean of its divisors is an integer number (100669282560).

Almost surely, 2^{1121212223391} is an apocalyptic number.

1121212223391 is a deficient number, since it is larger than the sum of its proper divisors (489496297569).

1121212223391 is a wasteful number, since it uses less digits than its factorization.

1121212223391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13620806.

The product of its digits is 2592, while the sum is 30.

The spelling of 1121212223391 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-three thousand, three hundred ninety-one".