1111211223131 has 8 divisors (see below), whose sum is σ = 1122269890560. Its totient is φ = 1100157752232.

The previous prime is 1111211223121. The next prime is 1111211223149. The reversal of 1111211223131 is 1313221121111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111211223131 is a prime.

It is a super-2 number, since 2×1111211223131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111211223121) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 868625 + ... + 1725378.

It is an arithmetic number, because the mean of its divisors is an integer number (140283736320).

Almost surely, 2^{1111211223131} is an apocalyptic number.

1111211223131 is a deficient number, since it is larger than the sum of its proper divisors (11058667429).

1111211223131 is a wasteful number, since it uses less digits than its factorization.

1111211223131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598265.

The product of its digits is 72, while the sum is 20.

Adding to 1111211223131 its reverse (1313221121111), we get a palindrome (2424432344242).

The spelling of 1111211223131 in words is "one trillion, one hundred eleven billion, two hundred eleven million, two hundred twenty-three thousand, one hundred thirty-one".