20120002110121 has 4 divisors (see below), whose sum is σ = 20120058751572. Its totient is φ = 20119945468672.

The previous prime is 20120002110049. The next prime is 20120002110133. The reversal of 20120002110121 is 12101120002102.

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 1011913271721 + 19108088838400 = 1005939^2 + 4371280^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120002110121 - 2³⁷ = 19982563156649 is a prime.

It is a super-2 number, since 2×20120002110121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120002110161) 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, 27784516 + ... + 28499461.

It is an arithmetic number, because the mean of its divisors is an integer number (5030014687893).

Almost surely, 2^{20120002110121} is an apocalyptic number.

It is an amenable number.

20120002110121 is a deficient number, since it is larger than the sum of its proper divisors (56641451).

20120002110121 is an equidigital number, since it uses as much as digits as its factorization.

20120002110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56641450.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20120002110121 its reverse (12101120002102), we get a palindrome (32221122112223).

The spelling of 20120002110121 in words is "twenty trillion, one hundred twenty billion, two million, one hundred ten thousand, one hundred twenty-one".