1221220120222 has 8 divisors (see below), whose sum is σ = 1831962895776. Its totient is φ = 610565821632.

The previous prime is 1221220120201. The next prime is 1221220120243. The reversal of 1221220120222 is 2220210221221.

It is an interprime number because it is at equal distance from previous prime (1221220120201) and next prime (1221220120243).

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

It is a super-2 number, since 2×1221220120222² (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 1221220120222.

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, 22084723 + ... + 22139950.

It is an arithmetic number, because the mean of its divisors is an integer number (228995361972).

Almost surely, 2^{1221220120222} is an apocalyptic number.

1221220120222 is a deficient number, since it is larger than the sum of its proper divisors (610742775554).

1221220120222 is a wasteful number, since it uses less digits than its factorization.

1221220120222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44238482.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1221220120222 its reverse (2220210221221), we get a palindrome (3441430341443).

The spelling of 1221220120222 in words is "one trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twenty thousand, two hundred twenty-two".