20110120121201 has 4 divisors (see below), whose sum is σ = 21938312859504. Its totient is φ = 18281927382900.

The previous prime is 20110120121197. The next prime is 20110120121281. The reversal of 20110120121201 is 10212102101102.

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 20110120121201 - 2² = 20110120121197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20110120121281) 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, 914096369135 + ... + 914096369156.

It is an arithmetic number, because the mean of its divisors is an integer number (5484578214876).

Almost surely, 2^{20110120121201} is an apocalyptic number.

It is an amenable number.

20110120121201 is a deficient number, since it is larger than the sum of its proper divisors (1828192738303).

20110120121201 is a wasteful number, since it uses less digits than its factorization.

20110120121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828192738302.

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

Adding to 20110120121201 its reverse (10212102101102), we get a palindrome (30322222222303).

It can be divided in two parts, 201101 and 20121201, that added together give a palindrome (20322302).

The spelling of 20110120121201 in words is "twenty trillion, one hundred ten billion, one hundred twenty million, one hundred twenty-one thousand, two hundred one".