2220222001221 has 48 divisors (see below), whose sum is σ = 3764773968384. Its totient is φ = 1234216300032.

The previous prime is 2220222001199. The next prime is 2220222001297. The reversal of 2220222001221 is 1221002220222.

2220222001221 is a `hidden beast` number, since 2 + 220 + 2 + 220 + 0 + 1 + 221 = 666.

It is not a de Polignac number, because 2220222001221 - 2⁷ = 2220222001093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2220222001194 and 2220222001203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220222001721) 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, 15553645 + ... + 15695741.

It is an arithmetic number, because the mean of its divisors is an integer number (78432791008).

Almost surely, 2^{2220222001221} is an apocalyptic number.

2220222001221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2220222001221 is a deficient number, since it is larger than the sum of its proper divisors (1544551967163).

2220222001221 is a wasteful number, since it uses less digits than its factorization.

2220222001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148850 (or 148847 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2220222001221 its reverse (1221002220222), we get a palindrome (3441224221443).

The spelling of 2220222001221 in words is "two trillion, two hundred twenty billion, two hundred twenty-two million, one thousand, two hundred twenty-one".