1020200101 has 4 divisors (see below), whose sum is σ = 1020272704. Its totient is φ = 1020127500.

The previous prime is 1020200099. The next prime is 1020200113. The reversal of 1020200101 is 1010020201.

1020200101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1010020201 = 17 ⋅59412953.

It is a cyclic number.

It is not a de Polignac number, because 1020200101 - 2¹ = 1020200099 is a prime.

It is a super-3 number, since 3×1020200101³ (a number of 28 digits) contains 333 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 (1020200191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7725 + ... + 45826.

It is an arithmetic number, because the mean of its divisors is an integer number (255068176).

Almost surely, 2^1020200101 is an apocalyptic number.

It is an amenable number.

1020200101 is a deficient number, since it is larger than the sum of its proper divisors (72603).

1020200101 is an equidigital number, since it uses as much as digits as its factorization.

1020200101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72602.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1020200101 is about 31940.5713943880. The cubic root of 1020200101 is about 1006.6885308152.

Adding to 1020200101 its reverse (1010020201), we get a palindrome (2030220302).

The spelling of 1020200101 in words is "one billion, twenty million, two hundred thousand, one hundred one".