20210100010101 has 6 divisors (see below), whose sum is σ = 29192366681270. Its totient is φ = 13473400006728.

The previous prime is 20210100010091. The next prime is 20210100010109. The reversal of 20210100010101 is 10101000101202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18826912322001 + 1383187688100 = 4338999^2 + 1176090^2 .

It is not a de Polignac number, because 20210100010101 - 2⁷ = 20210100009973 is a prime.

It is a super-3 number, since 3×20210100010101³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 2245566667789 = 20210100010101 / (2 + 0 + 2 + 1 + 0 + 1 + 0 + 0 + 0 + 1 + 0 + 1 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210100010109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122783333886 + ... + 1122783333903.

Almost surely, 2^{20210100010101} is an apocalyptic number.

It is an amenable number.

20210100010101 is a deficient number, since it is larger than the sum of its proper divisors (8982266671169).

20210100010101 is a wasteful number, since it uses less digits than its factorization.

20210100010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245566667795 (or 2245566667792 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20210100010101 its reverse (10101000101202), we get a palindrome (30311100111303).

The spelling of 20210100010101 in words is "twenty trillion, two hundred ten billion, one hundred million, ten thousand, one hundred one".