221212112021011 has 8 divisors (see below), whose sum is σ = 230847006802464. Its totient is φ = 211578631978560.

The previous prime is 221212112021009. The next prime is 221212112021041. The reversal of 221212112021011 is 110120211212122.

It is a happy number.

221212112021011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221212112021011 - 2¹ = 221212112021009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221212112021011.

It is not an unprimeable number, because it can be changed into a prime (221212112021041) 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, 353365210 + ... + 353990671.

It is an arithmetic number, because the mean of its divisors is an integer number (28855875850308).

Almost surely, 2^{221212112021011} is an apocalyptic number.

221212112021011 is a deficient number, since it is larger than the sum of its proper divisors (9634894781453).

221212112021011 is a wasteful number, since it uses less digits than its factorization.

221212112021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707369501.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221212112021011 its reverse (110120211212122), we get a palindrome (331332323233133).

The spelling of 221212112021011 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred twelve million, twenty-one thousand, eleven".