212011110222021 has 24 divisors (see below), whose sum is σ = 334255909066560. Its totient is φ = 128423198880000.

The previous prime is 212011110221969. The next prime is 212011110222077. The reversal of 212011110222021 is 120222011110212.

212011110222021 is a `hidden beast` number, since 212 + 0 + 111 + 102 + 220 + 21 = 666.

It is not a de Polignac number, because 212011110222021 - 2¹⁹ = 212011109697733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212011110221985 and 212011110222003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011110622021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 569671980 + ... + 570044021.

It is an arithmetic number, because the mean of its divisors is an integer number (13927329544440).

Almost surely, 2^{212011110222021} is an apocalyptic number.

It is an amenable number.

212011110222021 is a deficient number, since it is larger than the sum of its proper divisors (122244798844539).

212011110222021 is a wasteful number, since it uses less digits than its factorization.

212011110222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139717897 (or 1139717894 counting only the distinct ones).

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

Adding to 212011110222021 its reverse (120222011110212), we get a palindrome (332233121332233).

The spelling of 212011110222021 in words is "two hundred twelve trillion, eleven billion, one hundred ten million, two hundred twenty-two thousand, twenty-one".