20120212112101 has 4 divisors (see below), whose sum is σ = 20122912456704. Its totient is φ = 20117511767500.

The previous prime is 20120212112087. The next prime is 20120212112153. The reversal of 20120212112101 is 10121121202102.

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.

It is a cyclic number.

It is not a de Polignac number, because 20120212112101 - 2²³ = 20120203723493 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 (20120212112801) 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, 1350161125 + ... + 1350176026.

It is an arithmetic number, because the mean of its divisors is an integer number (5030728114176).

Almost surely, 2^{20120212112101} is an apocalyptic number.

It is an amenable number.

20120212112101 is a deficient number, since it is larger than the sum of its proper divisors (2700344603).

20120212112101 is an equidigital number, since it uses as much as digits as its factorization.

20120212112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2700344602.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20120212112101 its reverse (10121121202102), we get a palindrome (30241333314203).

Subtracting from 20120212112101 its reverse (10121121202102), we obtain a palindrome (9999090909999).

The spelling of 20120212112101 in words is "twenty trillion, one hundred twenty billion, two hundred twelve million, one hundred twelve thousand, one hundred one".