21735981101 has 8 divisors (see below), whose sum is σ = 22204318080. Its totient is φ = 21267888768.

The previous prime is 21735981031. The next prime is 21735981107. The reversal of 21735981101 is 10118953712.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21735981101 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 (21735981107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124445 + ... + 242813.

It is an arithmetic number, because the mean of its divisors is an integer number (2775539760).

Almost surely, 2^21735981101 is an apocalyptic number.

It is an amenable number.

21735981101 is a deficient number, since it is larger than the sum of its proper divisors (468336979).

21735981101 is a wasteful number, since it uses less digits than its factorization.

21735981101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122323.

The product of its (nonzero) digits is 15120, while the sum is 38.

The spelling of 21735981101 in words is "twenty-one billion, seven hundred thirty-five million, nine hundred eighty-one thousand, one hundred one".