20201222101 has 4 divisors (see below), whose sum is σ = 20379994092. Its totient is φ = 20022450112.

The previous prime is 20201222099. The next prime is 20201222141. The reversal of 20201222101 is 10122210202.

It is a happy number.

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 221116900 + 19980105201 = 14870^2 + 141351^2 .

It is not a de Polignac number, because 20201222101 - 2¹ = 20201222099 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 (20201222141) 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, 89385826 + ... + 89386051.

It is an arithmetic number, because the mean of its divisors is an integer number (5094998523).

Almost surely, 2^20201222101 is an apocalyptic number.

It is an amenable number.

20201222101 is a deficient number, since it is larger than the sum of its proper divisors (178771991).

20201222101 is a wasteful number, since it uses less digits than its factorization.

20201222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178771990.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20201222101 its reverse (10122210202), we get a palindrome (30323432303).

The spelling of 20201222101 in words is "twenty billion, two hundred one million, two hundred twenty-two thousand, one hundred one".