222220011001221 has 40 divisors (see below), whose sum is σ = 351584013464640. Its totient is φ = 139392983348352.

The previous prime is 222220011001213. The next prime is 222220011001223. The reversal of 222220011001221 is 122100110022222.

It is a happy number.

222220011001221 is a `hidden beast` number, since 222 + 220 + 0 + 1 + 1 + 0 + 0 + 1 + 221 = 666.

It is not a de Polignac number, because 222220011001221 - 2³ = 222220011001213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222220011001194 and 222220011001203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222220011001223) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17771331 + ... + 27572816.

It is an arithmetic number, because the mean of its divisors is an integer number (8789600336616).

Almost surely, 2^{222220011001221} is an apocalyptic number.

It is an amenable number.

222220011001221 is a deficient number, since it is larger than the sum of its proper divisors (129364002463419).

222220011001221 is a wasteful number, since it uses less digits than its factorization.

222220011001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45347735 (or 45347726 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222220011001221 its reverse (122100110022222), we get a palindrome (344320121023443).

The spelling of 222220011001221 in words is "two hundred twenty-two trillion, two hundred twenty billion, eleven million, one thousand, two hundred twenty-one".