1221100022022 has 8 divisors (see below), whose sum is σ = 2442200044056. Its totient is φ = 407033340672.

The previous prime is 1221100021951. The next prime is 1221100022057. The reversal of 1221100022022 is 2202200011221.

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

1221100022022 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1221100021992 and 1221100022010.

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, 101758335163 + ... + 101758335174.

It is an arithmetic number, because the mean of its divisors is an integer number (305275005507).

Almost surely, 2^{1221100022022} is an apocalyptic number.

1221100022022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221100022022 is a wasteful number, since it uses less digits than its factorization.

1221100022022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203516670342.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1221100022022 its reverse (2202200011221), we get a palindrome (3423300033243).

The spelling of 1221100022022 in words is "one trillion, two hundred twenty-one billion, one hundred million, twenty-two thousand, twenty-two".