1223001221213 has 16 divisors (see below), whose sum is σ = 1315007589120.
Its totient is φ = 1133767907136.
The previous prime is 1223001221177. The next prime is 1223001221237. The reversal of 1223001221213 is 3121221003221.
It is a cyclic number.
It is not a de Polignac number, because 1223001221213 - 26 = 1223001221149 is a prime.
It is a super-2 number, since 2×12230012212132 (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 (1223001221293) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4729295 + ... + 4981187.
It is an arithmetic number, because the mean of its divisors is an integer number (82187974320).
Almost surely, 21223001221213 is an apocalyptic number.
It is an amenable number.
1223001221213 is a deficient number, since it is larger than the sum of its proper divisors (92006367907).
1223001221213 is a wasteful number, since it uses less digits than its factorization.
1223001221213 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 257396.
The product of its (nonzero) digits is 288, while the sum is 20.
Adding to 1223001221213 its reverse (3121221003221), we get a palindrome (4344222224434).
The spelling of 1223001221213 in words is "one trillion, two hundred twenty-three billion, one million, two hundred twenty-one thousand, two hundred thirteen".