21343030401 has 36 divisors (see below), whose sum is σ = 36386495376. Its totient is φ = 11087279280.

The previous prime is 21343030399. The next prime is 21343030417. The reversal of 21343030401 is 10403034312.

It is not a de Polignac number, because 21343030401 - 2¹ = 21343030399 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21343030301) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 582175 + ... + 617748.

Almost surely, 2^21343030401 is an apocalyptic number.

21343030401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21343030401 is a deficient number, since it is larger than the sum of its proper divisors (15043464975).

21343030401 is a wasteful number, since it uses less digits than its factorization.

21343030401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199962 (or 1199944 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21343030401 its reverse (10403034312), we get a palindrome (31746064713).

The spelling of 21343030401 in words is "twenty-one billion, three hundred forty-three million, thirty thousand, four hundred one".