20110620121 has 2 divisors, whose sum is σ = 20110620122. Its totient is φ = 20110620120.

The previous prime is 20110620059. The next prime is 20110620143. The reversal of 20110620121 is 12102601102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19209960000 + 900660121 = 138600^2 + 30011^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110620121 - 2¹⁹ = 20110095833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20110620095 and 20110620104.

It is not a weakly prime, because it can be changed into another prime (20110620161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055310060 + 10055310061.

It is an arithmetic number, because the mean of its divisors is an integer number (10055310061).

Almost surely, 2^20110620121 is an apocalyptic number.

It is an amenable number.

20110620121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110620121 is an equidigital number, since it uses as much as digits as its factorization.

20110620121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The spelling of 20110620121 in words is "twenty billion, one hundred ten million, six hundred twenty thousand, one hundred twenty-one".