21014455101 has 4 divisors (see below), whose sum is σ = 28019273472. Its totient is φ = 14009636732.

The previous prime is 21014455093. The next prime is 21014455129. The reversal of 21014455101 is 10155441012.

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 21014455101 - 2³ = 21014455093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014455151) 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, 3502409181 + ... + 3502409186.

It is an arithmetic number, because the mean of its divisors is an integer number (7004818368).

Almost surely, 2^21014455101 is an apocalyptic number.

It is an amenable number.

21014455101 is a deficient number, since it is larger than the sum of its proper divisors (7004818371).

21014455101 is an equidigital number, since it uses as much as digits as its factorization.

21014455101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7004818370.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 21014455101 its reverse (10155441012), we get a palindrome (31169896113).

The spelling of 21014455101 in words is "twenty-one billion, fourteen million, four hundred fifty-five thousand, one hundred one".