20120112121201 has 4 divisors (see below), whose sum is σ = 20120444070912. Its totient is φ = 20119780171492.

The previous prime is 20120112121189. The next prime is 20120112121211. The reversal of 20120112121201 is 10212121102102.

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 20120112121201 - 2¹⁷ = 20120111990129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120112121211) 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, 165883921 + ... + 166005166.

It is an arithmetic number, because the mean of its divisors is an integer number (5030111017728).

Almost surely, 2^{20120112121201} is an apocalyptic number.

It is an amenable number.

20120112121201 is a deficient number, since it is larger than the sum of its proper divisors (331949711).

20120112121201 is an equidigital number, since it uses as much as digits as its factorization.

20120112121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331949710.

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

Adding to 20120112121201 its reverse (10212121102102), we get a palindrome (30332233223303).

The spelling of 20120112121201 in words is "twenty trillion, one hundred twenty billion, one hundred twelve million, one hundred twenty-one thousand, two hundred one".