20020120101 has 24 divisors (see below), whose sum is σ = 30009615480. Its totient is φ = 12845809536.

The previous prime is 20020120079. The next prime is 20020120123. The reversal of 20020120101 is 10102102002.

It is an interprime number because it is at equal distance from previous prime (20020120079) and next prime (20020120123).

It can be written as a sum of positive squares in 4 ways, for example, as 419840100 + 19600280001 = 20490^2 + 140001^2 .

It is not a de Polignac number, because 20020120101 - 2⁶ = 20020120037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020125101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38250 + ... + 203723.

It is an arithmetic number, because the mean of its divisors is an integer number (1250400645).

Almost surely, 2^20020120101 is an apocalyptic number.

It is an amenable number.

20020120101 is a deficient number, since it is larger than the sum of its proper divisors (9989495379).

20020120101 is a wasteful number, since it uses less digits than its factorization.

20020120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242325 (or 242322 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20020120101 its reverse (10102102002), we get a palindrome (30122222103).

The spelling of 20020120101 in words is "twenty billion, twenty million, one hundred twenty thousand, one hundred one".