212100020111 has 24 divisors (see below), whose sum is σ = 248548237344. Its totient is φ = 180464094720.

The previous prime is 212100020087. The next prime is 212100020159. The reversal of 212100020111 is 111020001212.

It is not a de Polignac number, because 212100020111 - 2²² = 212095825807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212100020092 and 212100020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100020711) 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, 3667526 + ... + 3724908.

It is an arithmetic number, because the mean of its divisors is an integer number (10356176556).

Almost surely, 2^212100020111 is an apocalyptic number.

212100020111 is a deficient number, since it is larger than the sum of its proper divisors (36448217233).

212100020111 is a wasteful number, since it uses less digits than its factorization.

212100020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57951 (or 57944 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 212100020111 its reverse (111020001212), we get a palindrome (323120021323).

The spelling of 212100020111 in words is "two hundred twelve billion, one hundred million, twenty thousand, one hundred eleven".