1223033131221 has 32 divisors (see below), whose sum is σ = 1853733686400. Its totient is φ = 710448506880.

The previous prime is 1223033131217. The next prime is 1223033131253. The reversal of 1223033131221 is 1221313303221.

It is not a de Polignac number, because 1223033131221 - 2² = 1223033131217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223033131191 and 1223033131200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223033131721) 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, 4533076 + ... + 4795293.

It is an arithmetic number, because the mean of its divisors is an integer number (57929177700).

Almost surely, 2^{1223033131221} is an apocalyptic number.

1223033131221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1223033131221 is a deficient number, since it is larger than the sum of its proper divisors (630700555179).

1223033131221 is a wasteful number, since it uses less digits than its factorization.

1223033131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9328549.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1223033131221 its reverse (1221313303221), we get a palindrome (2444346434442).

The spelling of 1223033131221 in words is "one trillion, two hundred twenty-three billion, thirty-three million, one hundred thirty-one thousand, two hundred twenty-one".