201002102101 has 4 divisors (see below), whose sum is σ = 207933209100. Its totient is φ = 194070995104.

The previous prime is 201002102053. The next prime is 201002102107. The reversal of 201002102101 is 101201200102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98329280625 + 102672821476 = 313575^2 + 320426^2 .

It is a cyclic number.

It is not a de Polignac number, because 201002102101 - 2⁷ = 201002101973 is a prime.

It is a super-2 number, since 2×201002102101² (a number of 23 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 (201002102107) 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, 3465553456 + ... + 3465553513.

It is an arithmetic number, because the mean of its divisors is an integer number (51983302275).

Almost surely, 2^201002102101 is an apocalyptic number.

It is an amenable number.

201002102101 is a deficient number, since it is larger than the sum of its proper divisors (6931106999).

201002102101 is an equidigital number, since it uses as much as digits as its factorization.

201002102101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6931106998.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 201002102101 its reverse (101201200102), we get a palindrome (302203302203).

The spelling of 201002102101 in words is "two hundred one billion, two million, one hundred two thousand, one hundred one".