211112020021 has 32 divisors (see below), whose sum is σ = 244170967040. Its totient is φ = 178794703296.

The previous prime is 211112020003. The next prime is 211112020039. The reversal of 211112020021 is 120020211112.

It is an interprime number because it is at equal distance from previous prime (211112020003) and next prime (211112020039).

It is a cyclic number.

It is not a de Polignac number, because 211112020021 - 2⁷ = 211112019893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211112019983 and 211112020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211112020321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254658235 + ... + 254659063.

It is an arithmetic number, because the mean of its divisors is an integer number (7630342720).

Almost surely, 2^211112020021 is an apocalyptic number.

It is an amenable number.

211112020021 is a deficient number, since it is larger than the sum of its proper divisors (33058947019).

211112020021 is a wasteful number, since it uses less digits than its factorization.

211112020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211112020021 its reverse (120020211112), we get a palindrome (331132231133).

The spelling of 211112020021 in words is "two hundred eleven billion, one hundred twelve million, twenty thousand, twenty-one".