221412401302021 has 8 divisors (see below), whose sum is σ = 226812899104344. Its totient is φ = 216011912801280.

The previous prime is 221412401302013. The next prime is 221412401302109. The reversal of 221412401302021 is 120203104214122.

221412401302021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 75379919629921 + 146032481672100 = 8682161^2 + 12084390^2 .

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 221412401302021 - 2³ = 221412401302013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221412401300021) 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, 90689115 + ... + 93098551.

It is an arithmetic number, because the mean of its divisors is an integer number (28351612388043).

Almost surely, 2^{221412401302021} is an apocalyptic number.

It is an amenable number.

221412401302021 is a deficient number, since it is larger than the sum of its proper divisors (5400497802323).

221412401302021 is a wasteful number, since it uses less digits than its factorization.

221412401302021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4650791.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 221412401302021 its reverse (120203104214122), we get a palindrome (341615505516143).

The spelling of 221412401302021 in words is "two hundred twenty-one trillion, four hundred twelve billion, four hundred one million, three hundred two thousand, twenty-one".