221012211331 has 8 divisors (see below), whose sum is σ = 234071702720. Its totient is φ = 208095446952.

The previous prime is 221012211323. The next prime is 221012211353. The reversal of 221012211331 is 133112210122.

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 221012211331 - 2³ = 221012211323 is a prime.

It is a super-2 number, since 2×221012211331² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221012211299 and 221012211308.

It is not an unprimeable number, because it can be changed into a prime (221012211361) 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, 35678565 + ... + 35684758.

It is an arithmetic number, because the mean of its divisors is an integer number (29258962840).

Almost surely, 2^221012211331 is an apocalyptic number.

221012211331 is a deficient number, since it is larger than the sum of its proper divisors (13059491389).

221012211331 is a wasteful number, since it uses less digits than its factorization.

221012211331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71363505.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 221012211331 its reverse (133112210122), we get a palindrome (354124421453).

The spelling of 221012211331 in words is "two hundred twenty-one billion, twelve million, two hundred eleven thousand, three hundred thirty-one".