20220101 has 4 divisors (see below), whose sum is σ = 22058304. Its totient is φ = 18381900.

The previous prime is 20220077. The next prime is 20220103. The reversal of 20220101 is 10102202.

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.

It is a cyclic number.

It is not a de Polignac number, because 20220101 - 2¹⁰ = 20219077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220103) 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, 919085 + ... + 919106.

It is an arithmetic number, because the mean of its divisors is an integer number (5514576).

Almost surely, 2^20220101 is an apocalyptic number.

It is an amenable number.

20220101 is a deficient number, since it is larger than the sum of its proper divisors (1838203).

20220101 is a wasteful number, since it uses less digits than its factorization.

20220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838202.

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

The square root of 20220101 is about 4496.6766617136. The cubic root of 20220101 is about 272.4338744806.

Adding to 20220101 its reverse (10102202), we get a palindrome (30322303).

The spelling of 20220101 in words is "twenty million, two hundred twenty thousand, one hundred one".