21011101100101 has 8 divisors (see below), whose sum is σ = 25056716840064. Its totient is φ = 17226492827280.

The previous prime is 21011101100029. The next prime is 21011101100117. The reversal of 21011101100101 is 10100110111012.

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

It is a cyclic number.

It is not a de Polignac number, because 21011101100101 - 2¹³ = 21011101091909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011101100501) 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, 65251866610 + ... + 65251866931.

It is an arithmetic number, because the mean of its divisors is an integer number (3132089605008).

Almost surely, 2^{21011101100101} is an apocalyptic number.

It is an amenable number.

21011101100101 is a deficient number, since it is larger than the sum of its proper divisors (4045615739963).

21011101100101 is a wasteful number, since it uses less digits than its factorization.

21011101100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130503733571.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 21011101100101 its reverse (10100110111012), we get a palindrome (31111211211113).

The spelling of 21011101100101 in words is "twenty-one trillion, eleven billion, one hundred one million, one hundred thousand, one hundred one".