1220222212001 has 8 divisors (see below), whose sum is σ = 1327632733224. Its totient is φ = 1114747015680.

The previous prime is 1220222211983. The next prime is 1220222212021. The reversal of 1220222212001 is 1002122220221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 699549601 + 1219522662400 = 26449^2 + 1104320^2 .

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 1220222212001 - 2²⁶ = 1220155103137 is a prime.

It is a super-2 number, since 2×1220222212001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220222212021) 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, 483829910 + ... + 483832431.

It is an arithmetic number, because the mean of its divisors is an integer number (165954091653).

Almost surely, 2^{1220222212001} is an apocalyptic number.

It is an amenable number.

1220222212001 is a deficient number, since it is larger than the sum of its proper divisors (107410521223).

1220222212001 is an equidigital number, since it uses as much as digits as its factorization.

1220222212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967662451.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1220222212001 its reverse (1002122220221), we get a palindrome (2222344432222).

The spelling of 1220222212001 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, two hundred twelve thousand, one".