1221012220022 has 8 divisors (see below), whose sum is σ = 2093163805776. Its totient is φ = 523290951432.

The previous prime is 1221012220009. The next prime is 1221012220061. The reversal of 1221012220022 is 2200222101221.

It is a happy number.

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

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, 43607579273 + ... + 43607579300.

It is an arithmetic number, because the mean of its divisors is an integer number (261645475722).

Almost surely, 2^{1221012220022} is an apocalyptic number.

1221012220022 is a deficient number, since it is larger than the sum of its proper divisors (872151585754).

1221012220022 is an equidigital number, since it uses as much as digits as its factorization.

1221012220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87215158582.

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

Adding to 1221012220022 its reverse (2200222101221), we get a palindrome (3421234321243).

The spelling of 1221012220022 in words is "one trillion, two hundred twenty-one billion, twelve million, two hundred twenty thousand, twenty-two".