1221002120122 has 8 divisors (see below), whose sum is σ = 1831513181472. Its totient is φ = 610497726300.

The previous prime is 1221002120119. The next prime is 1221002120171. The reversal of 1221002120122 is 2210212001221.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1221002120096 and 1221002120105.

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, 1180704 + ... + 1958587.

It is an arithmetic number, because the mean of its divisors is an integer number (228939147684).

Almost surely, 2^{1221002120122} is an apocalyptic number.

1221002120122 is a deficient number, since it is larger than the sum of its proper divisors (610511061350).

1221002120122 is a wasteful number, since it uses less digits than its factorization.

1221002120122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333764.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1221002120122 its reverse (2210212001221), we get a palindrome (3431214121343).

The spelling of 1221002120122 in words is "one trillion, two hundred twenty-one billion, two million, one hundred twenty thousand, one hundred twenty-two".