21111300401 has 4 divisors (see below), whose sum is σ = 21263180400. Its totient is φ = 20959420404.

The previous prime is 21111300391. The next prime is 21111300403. The reversal of 21111300401 is 10400311112.

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 21111300401 - 2⁶ = 21111300337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21111300403) 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, 75939791 + ... + 75940068.

It is an arithmetic number, because the mean of its divisors is an integer number (5315795100).

Almost surely, 2^21111300401 is an apocalyptic number.

It is an amenable number.

21111300401 is a deficient number, since it is larger than the sum of its proper divisors (151879999).

21111300401 is a wasteful number, since it uses less digits than its factorization.

21111300401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151879998.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21111300401 its reverse (10400311112), we get a palindrome (31511611513).

The spelling of 21111300401 in words is "twenty-one billion, one hundred eleven million, three hundred thousand, four hundred one".