212122221011 has 8 divisors (see below), whose sum is σ = 212447307600. Its totient is φ = 211797208800.

The previous prime is 212122221007. The next prime is 212122221023. The reversal of 212122221011 is 110122221212.

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 212122221011 - 2² = 212122221007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212122221041) 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, 8815745 + ... + 8839773.

It is an arithmetic number, because the mean of its divisors is an integer number (26555913450).

Almost surely, 2^212122221011 is an apocalyptic number.

212122221011 is a deficient number, since it is larger than the sum of its proper divisors (325086589).

212122221011 is a wasteful number, since it uses less digits than its factorization.

212122221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37189.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212122221011 its reverse (110122221212), we get a palindrome (322244442223).

The spelling of 212122221011 in words is "two hundred twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, eleven".