223121320011 has 64 divisors (see below), whose sum is σ = 363360384000. Its totient is φ = 134686126080.

The previous prime is 223121320007. The next prime is 223121320021. The reversal of 223121320011 is 110023121322.

223121320011 is a `hidden beast` number, since 22 + 312 + 1 + 320 + 0 + 11 = 666.

It is not a de Polignac number, because 223121320011 - 2² = 223121320007 is a prime.

It is a super-3 number, since 3×223121320011³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (223121320021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16618081 + ... + 16631501.

It is an arithmetic number, because the mean of its divisors is an integer number (5677506000).

Almost surely, 2^223121320011 is an apocalyptic number.

223121320011 is a deficient number, since it is larger than the sum of its proper divisors (140239063989).

223121320011 is a wasteful number, since it uses less digits than its factorization.

223121320011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14881 (or 14875 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 223121320011 its reverse (110023121322), we get a palindrome (333144441333).

The spelling of 223121320011 in words is "two hundred twenty-three billion, one hundred twenty-one million, three hundred twenty thousand, eleven".