20100011211 has 24 divisors (see below), whose sum is σ = 33886953984. Its totient is φ = 11241342000.

The previous prime is 20100011177. The next prime is 20100011221. The reversal of 20100011211 is 11211000102.

It is a happy number.

It is not a de Polignac number, because 20100011211 - 2⁹ = 20100010699 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 20100011193 and 20100011202.

It is not an unprimeable number, because it can be changed into a prime (20100011221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3391165 + ... + 3397086.

It is an arithmetic number, because the mean of its divisors is an integer number (1411956416).

Almost surely, 2^20100011211 is an apocalyptic number.

20100011211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20100011211 is a deficient number, since it is larger than the sum of its proper divisors (13786942773).

20100011211 is a wasteful number, since it uses less digits than its factorization.

20100011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6788311 (or 6788308 counting only the distinct ones).

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

Adding to 20100011211 its reverse (11211000102), we get a palindrome (31311011313).

The spelling of 20100011211 in words is "twenty billion, one hundred million, eleven thousand, two hundred eleven".