221222121001011 has 48 divisors (see below), whose sum is σ = 367336954333440. Its totient is φ = 127155099395520.

The previous prime is 221222121001001. The next prime is 221222121001031. The reversal of 221222121001011 is 110100121222122.

221222121001011 is a `hidden beast` number, since 2 + 212 + 221 + 210 + 0 + 10 + 11 = 666.

It is not a de Polignac number, because 221222121001011 - 2¹⁰ = 221222120999987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221222121001001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 700652901 + ... + 700968566.

It is an arithmetic number, because the mean of its divisors is an integer number (7652853215280).

Almost surely, 2^{221222121001011} is an apocalyptic number.

221222121001011 is a deficient number, since it is larger than the sum of its proper divisors (146114833332429).

221222121001011 is a wasteful number, since it uses less digits than its factorization.

221222121001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401621576 (or 1401621573 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221222121001011 its reverse (110100121222122), we get a palindrome (331322242223133).

The spelling of 221222121001011 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, one hundred twenty-one million, one thousand, eleven".