21710477101 has 16 divisors (see below), whose sum is σ = 23599825920. Its totient is φ = 19912210560.

The previous prime is 21710477099. The next prime is 21710477141. The reversal of 21710477101 is 10177401712.

It is a cyclic number.

It is not a de Polignac number, because 21710477101 - 2¹ = 21710477099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21710477141) 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 15 ways as a sum of consecutive naturals, for example, 61960 + ... + 217393.

It is an arithmetic number, because the mean of its divisors is an integer number (1474989120).

Almost surely, 2^21710477101 is an apocalyptic number.

It is an amenable number.

21710477101 is a deficient number, since it is larger than the sum of its proper divisors (1889348819).

21710477101 is a wasteful number, since it uses less digits than its factorization.

21710477101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279516.

The product of its (nonzero) digits is 2744, while the sum is 31.

Adding to 21710477101 its reverse (10177401712), we get a palindrome (31887878813).

The spelling of 21710477101 in words is "twenty-one billion, seven hundred ten million, four hundred seventy-seven thousand, one hundred one".