1221011002122 has 8 divisors (see below), whose sum is σ = 2442022004256. Its totient is φ = 407003667372.

The previous prime is 1221011002097. The next prime is 1221011002181. The reversal of 1221011002122 is 2212001101221.

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

1221011002122 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101750916838 + ... + 101750916849.

It is an arithmetic number, because the mean of its divisors is an integer number (305252750532).

Almost surely, 2^{1221011002122} is an apocalyptic number.

1221011002122 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.

1221011002122 is a wasteful number, since it uses less digits than its factorization.

1221011002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203501833692.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1221011002122 its reverse (2212001101221), we get a palindrome (3433012103343).

Subtracting 1221011002122 from its reverse (2212001101221), we obtain a palindrome (990990099099).

The spelling of 1221011002122 in words is "one trillion, two hundred twenty-one billion, eleven million, two thousand, one hundred twenty-two".