21011010110101 has 8 divisors (see below), whose sum is σ = 22955883588000. Its totient is φ = 19071933573840.

The previous prime is 21011010110093. The next prime is 21011010110117. The reversal of 21011010110101 is 10101101011012.

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 21011010110101 - 2³ = 21011010110093 is a prime.

It is a super-2 number, since 2×21011010110101² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011010110401) 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, 1449227826 + ... + 1449242323.

It is an arithmetic number, because the mean of its divisors is an integer number (2869485448500).

Almost surely, 2^{21011010110101} is an apocalyptic number.

It is an amenable number.

21011010110101 is a deficient number, since it is larger than the sum of its proper divisors (1944873477899).

21011010110101 is a wasteful number, since it uses less digits than its factorization.

21011010110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898470819.

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

Adding to 21011010110101 its reverse (10101101011012), we get a palindrome (31112111121113).

The spelling of 21011010110101 in words is "twenty-one trillion, eleven billion, ten million, one hundred ten thousand, one hundred one".