222020001221 has 8 divisors (see below), whose sum is σ = 228691678488. Its totient is φ = 215408160000.

The previous prime is 222020001209. The next prime is 222020001227. The reversal of 222020001221 is 122100020222.

It can be written as a sum of positive squares in 4 ways, for example, as 55808865121 + 166211136100 = 236239^2 + 407690^2 .

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 222020001221 - 2⁶ = 222020001157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222020001196 and 222020001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222020001227) 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, 14951480 + ... + 14966321.

It is an arithmetic number, because the mean of its divisors is an integer number (28586459811).

Almost surely, 2^222020001221 is an apocalyptic number.

It is an amenable number.

222020001221 is a deficient number, since it is larger than the sum of its proper divisors (6671677267).

222020001221 is a wasteful number, since it uses less digits than its factorization.

222020001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29918023.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 222020001221 its reverse (122100020222), we get a palindrome (344120021443).

It can be divided in two parts, 222020001 and 221, that added together give a palindrome (222020222).

The spelling of 222020001221 in words is "two hundred twenty-two billion, twenty million, one thousand, two hundred twenty-one".