20001211110 has 48 divisors (see below), whose sum is σ = 55062161856. Its totient is φ = 5019911424.

The previous prime is 20001211103. The next prime is 20001211133. The reversal of 20001211110 is 1111210002.

It is a happy number.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20001211092 and 20001211101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6534814 + ... + 6537873.

It is an arithmetic number, because the mean of its divisors is an integer number (1147128372).

Almost surely, 2^20001211110 is an apocalyptic number.

20001211110 is an abundant number, since it is smaller than the sum of its proper divisors (35060950746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001211110 is a wasteful number, since it uses less digits than its factorization.

20001211110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13072717 (or 13072714 counting only the distinct ones).

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

Adding to 20001211110 its reverse (1111210002), we get a palindrome (21112421112).

The spelling of 20001211110 in words is "twenty billion, one million, two hundred eleven thousand, one hundred ten".