21401101043 has 4 divisors (see below), whose sum is σ = 24458401200. Its totient is φ = 18343800888.

The previous prime is 21401101013. The next prime is 21401101063. The reversal of 21401101043 is 34010110412.

It is a happy number.

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

It is not a de Polignac number, because 21401101043 - 2²⁰ = 21400052467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21401101013) 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, 1528650068 + ... + 1528650081.

It is an arithmetic number, because the mean of its divisors is an integer number (6114600300).

Almost surely, 2^21401101043 is an apocalyptic number.

21401101043 is a deficient number, since it is larger than the sum of its proper divisors (3057300157).

21401101043 is an equidigital number, since it uses as much as digits as its factorization.

21401101043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3057300156.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21401101043 its reverse (34010110412), we get a palindrome (55411211455).

The spelling of 21401101043 in words is "twenty-one billion, four hundred one million, one hundred one thousand, forty-three".