211120020001 has 24 divisors (see below), whose sum is σ = 235939824864. Its totient is φ = 187347504960.

The previous prime is 211120019987. The next prime is 211120020011. The reversal of 211120020001 is 100020021112.

It is a de Polignac number, because none of the positive numbers 2^k-211120020001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211120020001.

It is not an unprimeable number, because it can be changed into a prime (211120020011) 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, 64818765 + ... + 64822021.

It is an arithmetic number, because the mean of its divisors is an integer number (9830826036).

Almost surely, 2^211120020001 is an apocalyptic number.

It is an amenable number.

211120020001 is a deficient number, since it is larger than the sum of its proper divisors (24819804863).

211120020001 is a wasteful number, since it uses less digits than its factorization.

211120020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6541 (or 6498 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 211120020001 its reverse (100020021112), we get a palindrome (311140041113).

The spelling of 211120020001 in words is "two hundred eleven billion, one hundred twenty million, twenty thousand, one".