20021202001 has 4 divisors (see below), whose sum is σ = 20022390000. Its totient is φ = 20020014004.

The previous prime is 20021201939. The next prime is 20021202059. The reversal of 20021202001 is 10020212002.

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 20021202001 - 2¹⁷ = 20021070929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021208001) 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, 568351 + ... + 602548.

It is an arithmetic number, because the mean of its divisors is an integer number (5005597500).

Almost surely, 2^20021202001 is an apocalyptic number.

It is an amenable number.

20021202001 is a deficient number, since it is larger than the sum of its proper divisors (1187999).

20021202001 is a wasteful number, since it uses less digits than its factorization.

20021202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187998.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20021202001 its reverse (10020212002), we get a palindrome (30041414003).

The spelling of 20021202001 in words is "twenty billion, twenty-one million, two hundred two thousand, one".