20211202001 has 2 divisors, whose sum is σ = 20211202002. Its totient is φ = 20211202000.

The previous prime is 20211201943. The next prime is 20211202003. The reversal of 20211202001 is 10020211202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20056224400 + 154977601 = 141620^2 + 12449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20211202001 is a prime.

Together with 20211202003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20211202003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105601000 + 10105601001.

It is an arithmetic number, because the mean of its divisors is an integer number (10105601001).

Almost surely, 2^20211202001 is an apocalyptic number.

It is an amenable number.

20211202001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211202001 is an equidigital number, since it uses as much as digits as its factorization.

20211202001 is an evil number, because the sum of its binary digits is even.

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

Adding to 20211202001 its reverse (10020211202), we get a palindrome (30231413203).

The spelling of 20211202001 in words is "twenty billion, two hundred eleven million, two hundred two thousand, one".