1421150855221 has 4 divisors (see below), whose sum is σ = 1455813071244. Its totient is φ = 1386488639200.

The previous prime is 1421150855219. The next prime is 1421150855273. The reversal of 1421150855221 is 1225580511241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77904624996 + 1343246230225 = 279114^2 + 1158985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421150855221 - 2¹ = 1421150855219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421150855281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17331107950 + ... + 17331108031.

It is an arithmetic number, because the mean of its divisors is an integer number (363953267811).

Almost surely, 2^{1421150855221} is an apocalyptic number.

It is an amenable number.

1421150855221 is a deficient number, since it is larger than the sum of its proper divisors (34662216023).

1421150855221 is an equidigital number, since it uses as much as digits as its factorization.

1421150855221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34662216022.

The product of its (nonzero) digits is 32000, while the sum is 37.

The spelling of 1421150855221 in words is "one trillion, four hundred twenty-one billion, one hundred fifty million, eight hundred fifty-five thousand, two hundred twenty-one".