20001200101 has 4 divisors (see below), whose sum is σ = 20013725932. Its totient is φ = 19988674272.

The previous prime is 20001200099. The next prime is 20001200119. The reversal of 20001200101 is 10100210002.

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 4563137601 + 15438062500 = 67551^2 + 124250^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001200101 - 2¹ = 20001200099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001210101) 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, 6260520 + ... + 6263713.

It is an arithmetic number, because the mean of its divisors is an integer number (5003431483).

Almost surely, 2^20001200101 is an apocalyptic number.

It is an amenable number.

20001200101 is a deficient number, since it is larger than the sum of its proper divisors (12525831).

20001200101 is a wasteful number, since it uses less digits than its factorization.

20001200101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12525830.

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

Adding to 20001200101 its reverse (10100210002), we get a palindrome (30101410103).

Subtracting from 20001200101 its reverse (10100210002), we obtain a palindrome (9900990099).

The spelling of 20001200101 in words is "twenty billion, one million, two hundred thousand, one hundred one".