21000311101 has 16 divisors (see below), whose sum is σ = 26187262848. Its totient is φ = 16360718400.

The previous prime is 21000311083. The next prime is 21000311107. The reversal of 21000311101 is 10111300012.

It is a cyclic number.

It is not a de Polignac number, because 21000311101 - 2¹¹ = 21000309053 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 (21000311107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424791 + ... + 471643.

It is an arithmetic number, because the mean of its divisors is an integer number (1636703928).

Almost surely, 2^21000311101 is an apocalyptic number.

It is an amenable number.

21000311101 is a deficient number, since it is larger than the sum of its proper divisors (5186951747).

21000311101 is a wasteful number, since it uses less digits than its factorization.

21000311101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52692.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 21000311101 its reverse (10111300012), we get a palindrome (31111611113).

The spelling of 21000311101 in words is "twenty-one billion, three hundred eleven thousand, one hundred one".