20120220120121 has 16 divisors (see below), whose sum is σ = 21966167556288. Its totient is φ = 18277080782400.

The previous prime is 20120220120071. The next prime is 20120220120137. The reversal of 20120220120121 is 12102102202102.

It is a happy number.

It is not a de Polignac number, because 20120220120121 - 2¹¹ = 20120220118073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20120220120095 and 20120220120104.

It is not an unprimeable number, because it can be changed into a prime (20120220120191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238855791 + ... + 238940011.

It is an arithmetic number, because the mean of its divisors is an integer number (1372885472268).

Almost surely, 2^{20120220120121} is an apocalyptic number.

It is an amenable number.

20120220120121 is a deficient number, since it is larger than the sum of its proper divisors (1845947436167).

20120220120121 is a wasteful number, since it uses less digits than its factorization.

20120220120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100632.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20120220120121 its reverse (12102102202102), we get a palindrome (32222322322223).

The spelling of 20120220120121 in words is "twenty trillion, one hundred twenty billion, two hundred twenty million, one hundred twenty thousand, one hundred twenty-one".