20111101210 has 16 divisors (see below), whose sum is σ = 36219467592. Its totient is φ = 8040110400.

The previous prime is 20111101193. The next prime is 20111101217. The reversal of 20111101210 is 1210111102.

It can be written as a sum of positive squares in 4 ways, for example, as 5393286721 + 14717814489 = 73439^2 + 121317^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (20111101217) 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, 521721 + ... + 558940.

Almost surely, 2^20111101210 is an apocalyptic number.

20111101210 is a deficient number, since it is larger than the sum of its proper divisors (16108366382).

20111101210 is a wasteful number, since it uses less digits than its factorization.

20111101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082529.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20111101210 its reverse (1210111102), we get a palindrome (21321212312).

The spelling of 20111101210 in words is "twenty billion, one hundred eleven million, one hundred one thousand, two hundred ten".