20122128101 has 4 divisors (see below), whose sum is σ = 20317488672. Its totient is φ = 19926767532.

The previous prime is 20122128079. The next prime is 20122128109. The reversal of 20122128101 is 10182122102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10182122102 = 2 ⋅5091061051.

It is a cyclic number.

It is not a de Polignac number, because 20122128101 - 2¹⁴ = 20122111717 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 (20122128109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97680131 + ... + 97680336.

It is an arithmetic number, because the mean of its divisors is an integer number (5079372168).

Almost surely, 2^20122128101 is an apocalyptic number.

It is an amenable number.

20122128101 is a deficient number, since it is larger than the sum of its proper divisors (195360571).

20122128101 is a wasteful number, since it uses less digits than its factorization.

20122128101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195360570.

The product of its (nonzero) digits is 128, while the sum is 20.

The spelling of 20122128101 in words is "twenty billion, one hundred twenty-two million, one hundred twenty-eight thousand, one hundred one".