1222212111031 has 4 divisors (see below), whose sum is σ = 1242927570600. Its totient is φ = 1201496651464.

The previous prime is 1222212111017. The next prime is 1222212111077. The reversal of 1222212111031 is 1301112122221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1222212111031 - 2⁹ = 1222212110519 is a prime.

It is a super-2 number, since 2×1222212111031² (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 (1222212111331) 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 3 ways as a sum of consecutive naturals, for example, 10357729696 + ... + 10357729813.

It is an arithmetic number, because the mean of its divisors is an integer number (310731892650).

Almost surely, 2^{1222212111031} is an apocalyptic number.

1222212111031 is a deficient number, since it is larger than the sum of its proper divisors (20715459569).

1222212111031 is an equidigital number, since it uses as much as digits as its factorization.

1222212111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20715459568.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1222212111031 its reverse (1301112122221), we get a palindrome (2523324233252).

The spelling of 1222212111031 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, one hundred eleven thousand, thirty-one".