21101414401 has 4 divisors (see below), whose sum is σ = 21164030212. Its totient is φ = 21038798592.

The previous prime is 21101414387. The next prime is 21101414417. The reversal of 21101414401 is 10441410112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3320525376 + 17780889025 = 57624^2 + 133345^2 .

It is a cyclic number.

It is not a de Polignac number, because 21101414401 - 2¹⁹ = 21100890113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101414431) 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, 31307400 + ... + 31308073.

It is an arithmetic number, because the mean of its divisors is an integer number (5291007553).

Almost surely, 2^21101414401 is an apocalyptic number.

It is an amenable number.

21101414401 is a deficient number, since it is larger than the sum of its proper divisors (62615811).

21101414401 is an equidigital number, since it uses as much as digits as its factorization.

21101414401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62615810.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21101414401 its reverse (10441410112), we get a palindrome (31542824513).

The spelling of 21101414401 in words is "twenty-one billion, one hundred one million, four hundred fourteen thousand, four hundred one".