212011202112021 has 18 divisors (see below), whose sum is σ = 331607264844258. Its totient is φ = 130468432068000.

The previous prime is 212011202112013. The next prime is 212011202112023. The reversal of 212011202112021 is 120211202110212.

It can be written as a sum of positive squares in 3 ways, for example, as 10724059607121 + 201287142504900 = 3274761^2 + 14187570^2 .

It is not a de Polignac number, because 212011202112021 - 2³ = 212011202112013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212011202111985 and 212011202112003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011202112023) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 69694673730 + ... + 69694676771.

It is an arithmetic number, because the mean of its divisors is an integer number (18422625824681).

Almost surely, 2^{212011202112021} is an apocalyptic number.

It is an amenable number.

212011202112021 is a deficient number, since it is larger than the sum of its proper divisors (119596062732237).

212011202112021 is a wasteful number, since it uses less digits than its factorization.

212011202112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139389350533 (or 139389350517 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212011202112021 its reverse (120211202110212), we get a palindrome (332222404222233).

The spelling of 212011202112021 in words is "two hundred twelve trillion, eleven billion, two hundred two million, one hundred twelve thousand, twenty-one".