21123013110101 has 8 divisors (see below), whose sum is σ = 24140640959424. Its totient is φ = 18105398897760.

The previous prime is 21123013110097. The next prime is 21123013110139. The reversal of 21123013110101 is 10101131032112.

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 21123013110101 - 2² = 21123013110097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21123013110101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123013110401) 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, 158906 + ... + 6501636.

It is an arithmetic number, because the mean of its divisors is an integer number (3017580119928).

Almost surely, 2^{21123013110101} is an apocalyptic number.

It is an amenable number.

21123013110101 is a deficient number, since it is larger than the sum of its proper divisors (3017627849323).

21123013110101 is an equidigital number, since it uses as much as digits as its factorization.

21123013110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6818491.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 21123013110101 its reverse (10101131032112), we get a palindrome (31224144142213).

The spelling of 21123013110101 in words is "twenty-one trillion, one hundred twenty-three billion, thirteen million, one hundred ten thousand, one hundred one".