20012200101 has 24 divisors (see below), whose sum is σ = 29723989880. Its totient is φ = 12965049216.

The previous prime is 20012200099. The next prime is 20012200139. The reversal of 20012200101 is 10100221002.

It can be written as a sum of positive squares in 4 ways, for example, as 9516197601 + 10496002500 = 97551^2 + 102450^2 .

It is not a de Polignac number, because 20012200101 - 2¹ = 20012200099 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012200001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 239811 + ... + 312303.

Almost surely, 2^20012200101 is an apocalyptic number.

It is an amenable number.

20012200101 is a deficient number, since it is larger than the sum of its proper divisors (9711789779).

20012200101 is a wasteful number, since it uses less digits than its factorization.

20012200101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73365 (or 73362 counting only the distinct ones).

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

Adding to 20012200101 its reverse (10100221002), we get a palindrome (30112421103).

It can be divided in two parts, 20012200 and 101, that added together give a triangular number (20012301 = T₆₃₂₆).

The spelling of 20012200101 in words is "twenty billion, twelve million, two hundred thousand, one hundred one".