20100101211 has 16 divisors (see below), whose sum is σ = 30504220320. Its totient is φ = 13073235840.

The previous prime is 20100101201. The next prime is 20100101213. The reversal of 20100101211 is 11210100102.

It is a happy number.

It is not a de Polignac number, because 20100101211 - 2²³ = 20091712603 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 = 20100101193 and 20100101202.

It is not an unprimeable number, because it can be changed into a prime (20100101213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9077530 + ... + 9079743.

It is an arithmetic number, because the mean of its divisors is an integer number (1906513770).

Almost surely, 2^20100101211 is an apocalyptic number.

20100101211 is a deficient number, since it is larger than the sum of its proper divisors (10404119109).

20100101211 is a wasteful number, since it uses less digits than its factorization.

20100101211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18157323 (or 18157317 counting only the distinct ones).

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

Adding to 20100101211 its reverse (11210100102), we get a palindrome (31310201313).

The spelling of 20100101211 in words is "twenty billion, one hundred million, one hundred one thousand, two hundred eleven".