21035027101 has 4 divisors (see below), whose sum is σ = 22947302304. Its totient is φ = 19122751900.

The previous prime is 21035027093. The next prime is 21035027113. The reversal of 21035027101 is 10172053012.

It is a happy number.

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 21035027101 - 2³ = 21035027093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21035027141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 956137585 + ... + 956137606.

It is an arithmetic number, because the mean of its divisors is an integer number (5736825576).

Almost surely, 2^21035027101 is an apocalyptic number.

It is an amenable number.

21035027101 is a deficient number, since it is larger than the sum of its proper divisors (1912275203).

21035027101 is a wasteful number, since it uses less digits than its factorization.

21035027101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912275202.

The product of its (nonzero) digits is 420, while the sum is 22.

The spelling of 21035027101 in words is "twenty-one billion, thirty-five million, twenty-seven thousand, one hundred one".