221400021434203 has 4 divisors (see below), whose sum is σ = 221400141687040. Its totient is φ = 221399901181368.

The previous prime is 221400021434191. The next prime is 221400021434213. The reversal of 221400021434203 is 302434120004122.

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

It is a cyclic number.

It is not a de Polignac number, because 221400021434203 - 2¹³ = 221400021426011 is a prime.

It is a super-3 number, since 3×221400021434203³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221400021434213) 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, 57321108 + ... + 61061521.

It is an arithmetic number, because the mean of its divisors is an integer number (55350035421760).

Almost surely, 2^{221400021434203} is an apocalyptic number.

221400021434203 is a deficient number, since it is larger than the sum of its proper divisors (120252837).

221400021434203 is a wasteful number, since it uses less digits than its factorization.

221400021434203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120252836.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 221400021434203 its reverse (302434120004122), we get a palindrome (523834141438325).

The spelling of 221400021434203 in words is "two hundred twenty-one trillion, four hundred billion, twenty-one million, four hundred thirty-four thousand, two hundred three".