211210120020111 has 16 divisors (see below), whose sum is σ = 282512095726560. Its totient is φ = 140357989779840.

The previous prime is 211210120020049. The next prime is 211210120020131. The reversal of 211210120020111 is 111020021012112.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-211210120020111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211210120020131) 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, 66482320 + ... + 69586773.

It is an arithmetic number, because the mean of its divisors is an integer number (17657005982910).

Almost surely, 2^{211210120020111} is an apocalyptic number.

211210120020111 is a deficient number, since it is larger than the sum of its proper divisors (71301975706449).

211210120020111 is a wasteful number, since it uses less digits than its factorization.

211210120020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136070746.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211210120020111 its reverse (111020021012112), we get a palindrome (322230141032223).

The spelling of 211210120020111 in words is "two hundred eleven trillion, two hundred ten billion, one hundred twenty million, twenty thousand, one hundred eleven".