1221111002222 has 8 divisors (see below), whose sum is σ = 1831691462016. Its totient is φ = 610547181552.

The previous prime is 1221111002213. The next prime is 1221111002239. The reversal of 1221111002222 is 2222001111221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1221111002222² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221111002222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3974663 + ... + 4270850.

It is an arithmetic number, because the mean of its divisors is an integer number (228961432752).

Almost surely, 2^{1221111002222} is an apocalyptic number.

1221111002222 is a deficient number, since it is larger than the sum of its proper divisors (610580459794).

1221111002222 is an equidigital number, since it uses as much as digits as its factorization.

1221111002222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8319562.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1221111002222 its reverse (2222001111221), we get a palindrome (3443112113443).

The spelling of 1221111002222 in words is "one trillion, two hundred twenty-one billion, one hundred eleven million, two thousand, two hundred twenty-two".