20420340112101 has 32 divisors (see below), whose sum is σ = 27856073304576. Its totient is φ = 13302442296000.

The previous prime is 20420340112063. The next prime is 20420340112103. The reversal of 20420340112101 is 10121104302402.

It is not a de Polignac number, because 20420340112101 - 2¹⁷ = 20420339981029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420340112103) 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, 63323211 + ... + 63644871.

It is an arithmetic number, because the mean of its divisors is an integer number (870502290768).

Almost surely, 2^{20420340112101} is an apocalyptic number.

It is an amenable number.

20420340112101 is a deficient number, since it is larger than the sum of its proper divisors (7435733192475).

20420340112101 is a wasteful number, since it uses less digits than its factorization.

20420340112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324273.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20420340112101 its reverse (10121104302402), we get a palindrome (30541444414503).

The spelling of 20420340112101 in words is "twenty trillion, four hundred twenty billion, three hundred forty million, one hundred twelve thousand, one hundred one".