203140400221 has 4 divisors (see below), whose sum is σ = 221607709344. Its totient is φ = 184673091100.

The previous prime is 203140400149. The next prime is 203140400233. The reversal of 203140400221 is 122004041302.

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 203140400221 - 2¹³ = 203140392029 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 (203140400921) 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, 9233654545 + ... + 9233654566.

It is an arithmetic number, because the mean of its divisors is an integer number (55401927336).

Almost surely, 2^203140400221 is an apocalyptic number.

It is an amenable number.

203140400221 is a deficient number, since it is larger than the sum of its proper divisors (18467309123).

203140400221 is a wasteful number, since it uses less digits than its factorization.

203140400221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18467309122.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 203140400221 its reverse (122004041302), we get a palindrome (325144441523).

The spelling of 203140400221 in words is "two hundred three billion, one hundred forty million, four hundred thousand, two hundred twenty-one".