20120021112101 has 16 divisors (see below), whose sum is σ = 21339316071360. Its totient is φ = 18904703850240.

The previous prime is 20120021112083. The next prime is 20120021112133. The reversal of 20120021112101 is 10121112002102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20120021112101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120021112181) 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, 197055275 + ... + 197157351.

It is an arithmetic number, because the mean of its divisors is an integer number (1333707254460).

Almost surely, 2^{20120021112101} is an apocalyptic number.

It is an amenable number.

20120021112101 is a deficient number, since it is larger than the sum of its proper divisors (1219294959259).

20120021112101 is a wasteful number, since it uses less digits than its factorization.

20120021112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121444.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20120021112101 its reverse (10121112002102), we get a palindrome (30241133114203).

The spelling of 20120021112101 in words is "twenty trillion, one hundred twenty billion, twenty-one million, one hundred twelve thousand, one hundred one".