1242003221401 has 4 divisors (see below), whose sum is σ = 1244553536512. Its totient is φ = 1239452906292.

The previous prime is 1242003221399. The next prime is 1242003221413. The reversal of 1242003221401 is 1041223002421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1242003221401 - 2¹ = 1242003221399 is a prime.

It is a super-2 number, since 2×1242003221401² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242003221441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1275156825 + ... + 1275157798.

It is an arithmetic number, because the mean of its divisors is an integer number (311138384128).

Almost surely, 2^{1242003221401} is an apocalyptic number.

It is an amenable number.

1242003221401 is a deficient number, since it is larger than the sum of its proper divisors (2550315111).

1242003221401 is an equidigital number, since it uses as much as digits as its factorization.

1242003221401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550315110.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 1242003221401 its reverse (1041223002421), we get a palindrome (2283226223822).

The spelling of 1242003221401 in words is "one trillion, two hundred forty-two billion, three million, two hundred twenty-one thousand, four hundred one".