21123101333113 has 16 divisors (see below), whose sum is σ = 23945714553600. Its totient is φ = 18471639306240.

The previous prime is 21123101333077. The next prime is 21123101333137. The reversal of 21123101333113 is 31133310132112.

It is a cyclic number.

It is not a de Polignac number, because 21123101333113 - 2⁹ = 21123101332601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21123101333513) 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, 11338608 + ... + 13069438.

It is an arithmetic number, because the mean of its divisors is an integer number (1496607159600).

Almost surely, 2^{21123101333113} is an apocalyptic number.

It is an amenable number.

21123101333113 is a deficient number, since it is larger than the sum of its proper divisors (2822613220487).

21123101333113 is a wasteful number, since it uses less digits than its factorization.

21123101333113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780272.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 21123101333113 its reverse (31133310132112), we get a palindrome (52256411465225).

The spelling of 21123101333113 in words is "twenty-one trillion, one hundred twenty-three billion, one hundred one million, three hundred thirty-three thousand, one hundred thirteen".