20010011211 has 24 divisors (see below), whose sum is σ = 30609328464. Its totient is φ = 12552929280.

The previous prime is 20010011209. The next prime is 20010011221. The reversal of 20010011211 is 11211001002.

It is a happy number.

It is not a de Polignac number, because 20010011211 - 2¹ = 20010011209 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 = 20010011193 and 20010011202.

It is not an unprimeable number, because it can be changed into a prime (20010011221) 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, 1166680 + ... + 1183706.

It is an arithmetic number, because the mean of its divisors is an integer number (1275388686).

Almost surely, 2^20010011211 is an apocalyptic number.

20010011211 is a deficient number, since it is larger than the sum of its proper divisors (10599317253).

20010011211 is a wasteful number, since it uses less digits than its factorization.

20010011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24731 (or 24728 counting only the distinct ones).

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

Adding to 20010011211 its reverse (11211001002), we get a palindrome (31221012213).

The spelling of 20010011211 in words is "twenty billion, ten million, eleven thousand, two hundred eleven".