212001111001021 has 8 divisors (see below), whose sum is σ = 213429023501400. Its totient is φ = 210573266317632.

The previous prime is 212001111001013. The next prime is 212001111001087. The reversal of 212001111001021 is 120100111100212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 41573673495225 + 170427437505796 = 6447765^2 + 13054786^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212001111001021 - 2³ = 212001111001013 is a prime.

It is a super-3 number, since 3×212001111001021³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212001111000992 and 212001111001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001111001721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10673230 + ... + 23193103.

It is an arithmetic number, because the mean of its divisors is an integer number (26678627937675).

Almost surely, 2^{212001111001021} is an apocalyptic number.

It is an amenable number.

212001111001021 is a deficient number, since it is larger than the sum of its proper divisors (1427912500379).

212001111001021 is a wasteful number, since it uses less digits than its factorization.

212001111001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33908495.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 212001111001021 its reverse (120100111100212), we get a palindrome (332101222101233).

The spelling of 212001111001021 in words is "two hundred twelve trillion, one billion, one hundred eleven million, one thousand, twenty-one".