1221164141223 has 32 divisors (see below), whose sum is σ = 1774278475200. Its totient is φ = 742576766976.

The previous prime is 1221164141221. The next prime is 1221164141273. The reversal of 1221164141223 is 3221414611221.

It is not a de Polignac number, because 1221164141223 - 2¹ = 1221164141221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221164141221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5475511 + ... + 5694167.

It is an arithmetic number, because the mean of its divisors is an integer number (55446202350).

Almost surely, 2^{1221164141223} is an apocalyptic number.

1221164141223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1221164141223 is a deficient number, since it is larger than the sum of its proper divisors (553114333977).

1221164141223 is a wasteful number, since it uses less digits than its factorization.

1221164141223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220371.

The product of its digits is 4608, while the sum is 30.

Adding to 1221164141223 its reverse (3221414611221), we get a palindrome (4442578752444).

The spelling of 1221164141223 in words is "one trillion, two hundred twenty-one billion, one hundred sixty-four million, one hundred forty-one thousand, two hundred twenty-three".