1222310111021 has 4 divisors (see below), whose sum is σ = 1222839022944. Its totient is φ = 1221781199100.

The previous prime is 1222310111003. The next prime is 1222310111027. The reversal of 1222310111021 is 1201110132221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1222310111021 - 2²⁶ = 1222243002157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222310111027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264452495 + ... + 264457116.

It is an arithmetic number, because the mean of its divisors is an integer number (305709755736).

Almost surely, 2^{1222310111021} is an apocalyptic number.

It is an amenable number.

1222310111021 is a deficient number, since it is larger than the sum of its proper divisors (528911923).

1222310111021 is an equidigital number, since it uses as much as digits as its factorization.

1222310111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528911922.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1222310111021 its reverse (1201110132221), we get a palindrome (2423420243242).

It can be divided in two parts, 1222310 and 111021, that added together give a palindrome (1333331).

The spelling of 1222310111021 in words is "one trillion, two hundred twenty-two billion, three hundred ten million, one hundred eleven thousand, twenty-one".