20102220120121 has 4 divisors (see below), whose sum is σ = 20214523026000. Its totient is φ = 19989917214244.

The previous prime is 20102220120011. The next prime is 20102220120139. The reversal of 20102220120121 is 12102102220102.

It is a happy number.

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 20102220120121 - 2¹⁹ = 20102219595833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102220120095 and 20102220120104.

It is not an unprimeable number, because it can be changed into a prime (20102220120221) 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, 56151452671 + ... + 56151453028.

It is an arithmetic number, because the mean of its divisors is an integer number (5053630756500).

Almost surely, 2^{20102220120121} is an apocalyptic number.

It is an amenable number.

20102220120121 is a deficient number, since it is larger than the sum of its proper divisors (112302905879).

20102220120121 is a wasteful number, since it uses less digits than its factorization.

20102220120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112302905878.

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

Adding to 20102220120121 its reverse (12102102220102), we get a palindrome (32204322340223).

The spelling of 20102220120121 in words is "twenty trillion, one hundred two billion, two hundred twenty million, one hundred twenty thousand, one hundred twenty-one".