21430201401 has 48 divisors (see below), whose sum is σ = 38537654400. Its totient is φ = 11713385376.

The previous prime is 21430201363. The next prime is 21430201423. The reversal of 21430201401 is 10410203412.

21430201401 is a `hidden beast` number, since 21 + 43 + 0 + 201 + 401 = 666.

It is not a de Polignac number, because 21430201401 - 2¹⁵ = 21430168633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21430201301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 321706 + ... + 382563.

It is an arithmetic number, because the mean of its divisors is an integer number (802867800).

Almost surely, 2^21430201401 is an apocalyptic number.

21430201401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21430201401 is a deficient number, since it is larger than the sum of its proper divisors (17107452999).

21430201401 is a wasteful number, since it uses less digits than its factorization.

21430201401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704315 (or 704302 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21430201401 its reverse (10410203412), we get a palindrome (31840404813).

The spelling of 21430201401 in words is "twenty-one billion, four hundred thirty million, two hundred one thousand, four hundred one".