21122345101 has 32 divisors (see below), whose sum is σ = 25712225280. Its totient is φ = 17088537600.

The previous prime is 21122345099. The next prime is 21122345119. The reversal of 21122345101 is 10154322112.

It is a cyclic number.

It is not a de Polignac number, because 21122345101 - 2¹ = 21122345099 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 (21122340101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1183621 + ... + 1201333.

It is an arithmetic number, because the mean of its divisors is an integer number (803507040).

Almost surely, 2^21122345101 is an apocalyptic number.

It is an amenable number.

21122345101 is a deficient number, since it is larger than the sum of its proper divisors (4589880179).

21122345101 is a wasteful number, since it uses less digits than its factorization.

21122345101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18037.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 21122345101 its reverse (10154322112), we get a palindrome (31276667213).

The spelling of 21122345101 in words is "twenty-one billion, one hundred twenty-two million, three hundred forty-five thousand, one hundred one".