20021201201 has 4 divisors (see below), whose sum is σ = 20021978112. Its totient is φ = 20020424292.

The previous prime is 20021201183. The next prime is 20021201203. The reversal of 20021201201 is 10210212002.

It is a happy number.

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 20021201201 - 2¹⁴ = 20021184817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021201203) 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, 348425 + ... + 401798.

It is an arithmetic number, because the mean of its divisors is an integer number (5005494528).

Almost surely, 2^20021201201 is an apocalyptic number.

It is an amenable number.

20021201201 is a deficient number, since it is larger than the sum of its proper divisors (776911).

20021201201 is an equidigital number, since it uses as much as digits as its factorization.

20021201201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776910.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20021201201 its reverse (10210212002), we get a palindrome (30231413203).

The spelling of 20021201201 in words is "twenty billion, twenty-one million, two hundred one thousand, two hundred one".