1221423001433 has 8 divisors (see below), whose sum is σ = 1324814619240. Its totient is φ = 1121536184320.

The previous prime is 1221423001369. The next prime is 1221423001453. The reversal of 1221423001433 is 3341003241221.

It can be written as a sum of positive squares in 4 ways, for example, as 143889731584 + 1077533269849 = 379328^2 + 1038043^2 .

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 1221423001433 - 2⁶ = 1221423001369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221423001453) 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, 876199448 + ... + 876200841.

It is an arithmetic number, because the mean of its divisors is an integer number (165601827405).

Almost surely, 2^{1221423001433} is an apocalyptic number.

It is an amenable number.

1221423001433 is a deficient number, since it is larger than the sum of its proper divisors (103391617807).

1221423001433 is a wasteful number, since it uses less digits than its factorization.

1221423001433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752400347.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 1221423001433 its reverse (3341003241221), we get a palindrome (4562426242654).

The spelling of 1221423001433 in words is "one trillion, two hundred twenty-one billion, four hundred twenty-three million, one thousand, four hundred thirty-three".