212021111011021 has 16 divisors (see below), whose sum is σ = 229657394977920. Its totient is φ = 194574464199360.

The previous prime is 212021111011019. The next prime is 212021111011043. The reversal of 212021111011021 is 120110111120212.

It is a cyclic number.

It is not a de Polignac number, because 212021111011021 - 2¹ = 212021111011019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212021111010986 and 212021111011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021111011121) 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, 71713240 + ... + 74611198.

It is an arithmetic number, because the mean of its divisors is an integer number (14353587186120).

Almost surely, 2^{212021111011021} is an apocalyptic number.

It is an amenable number.

212021111011021 is a deficient number, since it is larger than the sum of its proper divisors (17636283966899).

212021111011021 is a wasteful number, since it uses less digits than its factorization.

212021111011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2930676.

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

Adding to 212021111011021 its reverse (120110111120212), we get a palindrome (332131222131233).

The spelling of 212021111011021 in words is "two hundred twelve trillion, twenty-one billion, one hundred eleven million, eleven thousand, twenty-one".