212011212212021 has 16 divisors (see below), whose sum is σ = 221312641554048. Its totient is φ = 202716753624000.

The previous prime is 212011212212003. The next prime is 212011212212053. The reversal of 212011212212021 is 120212212110212.

212011212212021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212011212212021 - 2¹⁰ = 212011212210997 is a prime.

It is a super-2 number, since 2×212011212212021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212011212211984 and 212011212212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011212212071) 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, 1277855171 + ... + 1278021071.

It is an arithmetic number, because the mean of its divisors is an integer number (13832040097128).

Almost surely, 2^{212011212212021} is an apocalyptic number.

It is an amenable number.

212011212212021 is a deficient number, since it is larger than the sum of its proper divisors (9301429342027).

212011212212021 is a wasteful number, since it uses less digits than its factorization.

212011212212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186572.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 212011212212021 its reverse (120212212110212), we get a palindrome (332223424322233).

The spelling of 212011212212021 in words is "two hundred twelve trillion, eleven billion, two hundred twelve million, two hundred twelve thousand, twenty-one".