21051113401 has 8 divisors (see below), whose sum is σ = 21206094560. Its totient is φ = 20896183008.

The previous prime is 21051113389. The next prime is 21051113417. The reversal of 21051113401 is 10431115012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21051113401 - 2¹⁹ = 21050589113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21051113701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1356850 + ... + 1372276.

It is an arithmetic number, because the mean of its divisors is an integer number (2650761820).

Almost surely, 2^21051113401 is an apocalyptic number.

It is an amenable number.

21051113401 is a deficient number, since it is larger than the sum of its proper divisors (154981159).

21051113401 is a wasteful number, since it uses less digits than its factorization.

21051113401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25383.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 21051113401 its reverse (10431115012), we get a palindrome (31482228413).

The spelling of 21051113401 in words is "twenty-one billion, fifty-one million, one hundred thirteen thousand, four hundred one".