20001011211 has 8 divisors (see below), whose sum is σ = 29631127760. Its totient is φ = 13334007456.

The previous prime is 20001011167. The next prime is 20001011221. The reversal of 20001011211 is 11211010002.

It is a happy number.

It is not a de Polignac number, because 20001011211 - 2¹¹ = 20001009163 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 a junction number, because it is equal to n+sod(n) for n = 20001011193 and 20001011202.

It is not an unprimeable number, because it can be changed into a prime (20001011221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370389070 + ... + 370389123.

It is an arithmetic number, because the mean of its divisors is an integer number (3703890970).

Almost surely, 2^20001011211 is an apocalyptic number.

20001011211 is a deficient number, since it is larger than the sum of its proper divisors (9630116549).

20001011211 is an equidigital number, since it uses as much as digits as its factorization.

20001011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740778202 (or 740778196 counting only the distinct ones).

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

Adding to 20001011211 its reverse (11211010002), we get a palindrome (31212021213).

The spelling of 20001011211 in words is "twenty billion, one million, eleven thousand, two hundred eleven".