20202020101 has 8 divisors (see below), whose sum is σ = 20437954200. Its totient is φ = 19966790400.

The previous prime is 20202020099. The next prime is 20202020119. The reversal of 20202020101 is 10102020202.

It can be written as a sum of positive squares in 4 ways, for example, as 8101800100 + 12100220001 = 90010^2 + 110001^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20202020101 - 2¹ = 20202020099 is a prime.

It is a super-2 number, since 2×20202020101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202020131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118296 + ... + 233233.

It is an arithmetic number, because the mean of its divisors is an integer number (2554744275).

Almost surely, 2^20202020101 is an apocalyptic number.

It is an amenable number.

20202020101 is a deficient number, since it is larger than the sum of its proper divisors (235934099).

20202020101 is a wasteful number, since it uses less digits than its factorization.

20202020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352199.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20202020101 its reverse (10102020202), we get a palindrome (30304040303).

The spelling of 20202020101 in words is "twenty billion, two hundred two million, twenty thousand, one hundred one".