212000111221021 has 16 divisors (see below), whose sum is σ = 218512426809600. Its totient is φ = 205585815052800.

The previous prime is 212000111221013. The next prime is 212000111221097. The reversal of 212000111221021 is 120122111000212.

It is a cyclic number.

It is not a de Polignac number, because 212000111221021 - 2³ = 212000111221013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212000111220986 and 212000111221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212000111221621) 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, 745998285 + ... + 746282413.

It is an arithmetic number, because the mean of its divisors is an integer number (13657026675600).

Almost surely, 2^{212000111221021} is an apocalyptic number.

It is an amenable number.

212000111221021 is a deficient number, since it is larger than the sum of its proper divisors (6512315588579).

212000111221021 is a wasteful number, since it uses less digits than its factorization.

212000111221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456540.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212000111221021 its reverse (120122111000212), we get a palindrome (332122222221233).

The spelling of 212000111221021 in words is "two hundred twelve trillion, one hundred eleven million, two hundred twenty-one thousand, twenty-one".