20120103211 has 16 divisors (see below), whose sum is σ = 23475934944. Its totient is φ = 17073391104.

The previous prime is 20120103191. The next prime is 20120103247. The reversal of 20120103211 is 11230102102.

It is a cyclic number.

It is not a de Polignac number, because 20120103211 - 2¹³ = 20120095019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20120103191 and 20120103200.

It is not an unprimeable number, because it can be changed into a prime (20120103251) 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, 1049116 + ... + 1068121.

It is an arithmetic number, because the mean of its divisors is an integer number (1467245934).

Almost surely, 2^20120103211 is an apocalyptic number.

20120103211 is a deficient number, since it is larger than the sum of its proper divisors (3355831733).

20120103211 is a wasteful number, since it uses less digits than its factorization.

20120103211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117310.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20120103211 its reverse (11230102102), we get a palindrome (31350205313).

The spelling of 20120103211 in words is "twenty billion, one hundred twenty million, one hundred three thousand, two hundred eleven".