1243213523401 has 8 divisors (see below), whose sum is σ = 1297512059904. Its totient is φ = 1188935468160.

The previous prime is 1243213523399. The next prime is 1243213523407. The reversal of 1243213523401 is 1043253123421.

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 1243213523401 - 2¹ = 1243213523399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243213523407) 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, 4996201 + ... + 5239126.

It is an arithmetic number, because the mean of its divisors is an integer number (162189007488).

Almost surely, 2^{1243213523401} is an apocalyptic number.

It is an amenable number.

1243213523401 is a deficient number, since it is larger than the sum of its proper divisors (54298536503).

1243213523401 is a wasteful number, since it uses less digits than its factorization.

1243213523401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10240631.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 1243213523401 its reverse (1043253123421), we get a palindrome (2286466646822).

The spelling of 1243213523401 in words is "one trillion, two hundred forty-three billion, two hundred thirteen million, five hundred twenty-three thousand, four hundred one".