1221340144203 has 12 divisors (see below), whose sum is σ = 1764198048600. Its totient is φ = 814208272416.

The previous prime is 1221340144151. The next prime is 1221340144229. The reversal of 1221340144203 is 3024410431221.

1221340144203 is a `hidden beast` number, since 1 + 2 + 2 + 13 + 401 + 44 + 203 = 666.

It is not a de Polignac number, because 1221340144203 - 2²⁴ = 1221323366987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221340144253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1116378 + ... + 1920671.

It is an arithmetic number, because the mean of its divisors is an integer number (147016504050).

Almost surely, 2^{1221340144203} is an apocalyptic number.

1221340144203 is a deficient number, since it is larger than the sum of its proper divisors (542857904397).

1221340144203 is a wasteful number, since it uses less digits than its factorization.

1221340144203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3081738 (or 3081735 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 1221340144203 its reverse (3024410431221), we get a palindrome (4245750575424).

The spelling of 1221340144203 in words is "one trillion, two hundred twenty-one billion, three hundred forty million, one hundred forty-four thousand, two hundred three".