20011210112101 has 4 divisors (see below), whose sum is σ = 21550533966892. Its totient is φ = 18471886257312.

The previous prime is 20011210112059. The next prime is 20011210112147. The reversal of 20011210112101 is 10121101211002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 998252763876 + 19012957348225 = 999126^2 + 4360385^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011210112101 - 2⁹ = 20011210111589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 1539323854777 = 20011210112101 / (2 + 0 + 0 + 1 + 1 + 2 + 1 + 0 + 1 + 1 + 2 + 1 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011210112171) 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, 769661927376 + ... + 769661927401.

It is an arithmetic number, because the mean of its divisors is an integer number (5387633491723).

Almost surely, 2^{20011210112101} is an apocalyptic number.

It is an amenable number.

20011210112101 is a deficient number, since it is larger than the sum of its proper divisors (1539323854791).

20011210112101 is a wasteful number, since it uses less digits than its factorization.

20011210112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539323854790.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20011210112101 its reverse (10121101211002), we get a palindrome (30132311323103).

The spelling of 20011210112101 in words is "twenty trillion, eleven billion, two hundred ten million, one hundred twelve thousand, one hundred one".