1550421055201 has 4 divisors (see below), whose sum is σ = 1551112283952. Its totient is φ = 1549729826452.

The previous prime is 1550421055189. The next prime is 1550421055207. The reversal of 1550421055201 is 1025501240551.

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 1550421055201 - 2¹³ = 1550421047009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1550421055207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345611011 + ... + 345615496.

It is an arithmetic number, because the mean of its divisors is an integer number (387778070988).

Almost surely, 2^{1550421055201} is an apocalyptic number.

It is an amenable number.

1550421055201 is a deficient number, since it is larger than the sum of its proper divisors (691228751).

1550421055201 is an equidigital number, since it uses as much as digits as its factorization.

1550421055201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691228750.

The product of its (nonzero) digits is 10000, while the sum is 31.

Adding to 1550421055201 its reverse (1025501240551), we get a palindrome (2575922295752).

The spelling of 1550421055201 in words is "one trillion, five hundred fifty billion, four hundred twenty-one million, fifty-five thousand, two hundred one".