1213221123011 has 2 divisors, whose sum is σ = 1213221123012. Its totient is φ = 1213221123010.

The previous prime is 1213221122921. The next prime is 1213221123113. The reversal of 1213221123011 is 1103211223121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213221123011 - 2³⁰ = 1212147381187 is a prime.

It is a super-2 number, since 2×1213221123011² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1213221123211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606610561505 + 606610561506.

It is an arithmetic number, because the mean of its divisors is an integer number (606610561506).

Almost surely, 2^{1213221123011} is an apocalyptic number.

1213221123011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213221123011 is an equidigital number, since it uses as much as digits as its factorization.

1213221123011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1213221123011 its reverse (1103211223121), we get a palindrome (2316432346132).

The spelling of 1213221123011 in words is "one trillion, two hundred thirteen billion, two hundred twenty-one million, one hundred twenty-three thousand, eleven".