2020102101 has 12 divisors (see below), whose sum is σ = 2921038380. Its totient is φ = 1345297920.

The previous prime is 2020102099. The next prime is 2020102109. The reversal of 2020102101 is 1012010202.

It can be written as a sum of positive squares in 2 ways, for example, as 1140683076 + 879419025 = 33774^2 + 29655^2 .

It is not a de Polignac number, because 2020102101 - 2¹ = 2020102099 is a prime.

It is a super-2 number, since 2×2020102101² = 8161624996929228402, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020102109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110796 + ... + 127733.

It is an arithmetic number, because the mean of its divisors is an integer number (243419865).

Almost surely, 2^2020102101 is an apocalyptic number.

It is an amenable number.

2020102101 is a deficient number, since it is larger than the sum of its proper divisors (900936279).

2020102101 is a wasteful number, since it uses less digits than its factorization.

2020102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239476 (or 239473 counting only the distinct ones).

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

The square root of 2020102101 is about 44945.5459528528. The cubic root of 2020102101 is about 1264.1281626191.

Adding to 2020102101 its reverse (1012010202), we get a palindrome (3032112303).

The spelling of 2020102101 in words is "two billion, twenty million, one hundred two thousand, one hundred one".