121122221002 has 16 divisors (see below), whose sum is σ = 181871691624. Its totient is φ = 60498360000.

The previous prime is 121122220963. The next prime is 121122221063. The reversal of 121122221002 is 200122221121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 91095916041 + 30026304961 = 301821^2 + 173281^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8706252 + ... + 8720152.

Almost surely, 2^121122221002 is an apocalyptic number.

121122221002 is a deficient number, since it is larger than the sum of its proper divisors (60749470622).

121122221002 is a wasteful number, since it uses less digits than its factorization.

121122221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18105.

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

Adding to 121122221002 its reverse (200122221121), we get a palindrome (321244442123).

The spelling of 121122221002 in words is "one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, two".