1222111345051 has 4 divisors (see below), whose sum is σ = 1264253115600. Its totient is φ = 1179969574504.

The previous prime is 1222111345031. The next prime is 1222111345097. The reversal of 1222111345051 is 1505431112221.

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 1222111345051 - 2¹⁵ = 1222111312283 is a prime.

It is a super-2 number, since 2×1222111345051² (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 (1222111345031) 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, 21070885231 + ... + 21070885288.

It is an arithmetic number, because the mean of its divisors is an integer number (316063278900).

Almost surely, 2^{1222111345051} is an apocalyptic number.

1222111345051 is a deficient number, since it is larger than the sum of its proper divisors (42141770549).

1222111345051 is an equidigital number, since it uses as much as digits as its factorization.

1222111345051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42141770548.

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 1222111345051 its reverse (1505431112221), we get a palindrome (2727542457272).

The spelling of 1222111345051 in words is "one trillion, two hundred twenty-two billion, one hundred eleven million, three hundred forty-five thousand, fifty-one".