1223121211013 has 8 divisors (see below), whose sum is σ = 1317223605600. Its totient is φ = 1129021123248.

The previous prime is 1223121211003. The next prime is 1223121211043. The reversal of 1223121211013 is 3101121213221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1223121211013 - 2³⁸ = 948243304069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223121211003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615878 + ... + 1680936.

It is an arithmetic number, because the mean of its divisors is an integer number (164652950700).

Almost surely, 2^{1223121211013} is an apocalyptic number.

1223121211013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1223121211013 is a deficient number, since it is larger than the sum of its proper divisors (94102394587).

1223121211013 is a wasteful number, since it uses less digits than its factorization.

1223121211013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153411.

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

Adding to 1223121211013 its reverse (3101121213221), we get a palindrome (4324242424234).

The spelling of 1223121211013 in words is "one trillion, two hundred twenty-three billion, one hundred twenty-one million, two hundred eleven thousand, thirteen".