20211011001 has 8 divisors (see below), whose sum is σ = 29942238560. Its totient is φ = 13474007316.

The previous prime is 20211010997. The next prime is 20211011003. The reversal of 20211011001 is 10011011202.

It is a happy number.

It is not a de Polignac number, because 20211011001 - 2² = 20211010997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211011003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374277955 + ... + 374278008.

It is an arithmetic number, because the mean of its divisors is an integer number (3742779820).

Almost surely, 2^20211011001 is an apocalyptic number.

It is an amenable number.

20211011001 is a deficient number, since it is larger than the sum of its proper divisors (9731227559).

20211011001 is an equidigital number, since it uses as much as digits as its factorization.

20211011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748555972 (or 748555966 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20211011001 its reverse (10011011202), we get a palindrome (30222022203).

The spelling of 20211011001 in words is "twenty billion, two hundred eleven million, eleven thousand, one".