121221211100002 has 16 divisors (see below), whose sum is σ = 195830306861112. Its totient is φ = 55944986307840.

The previous prime is 121221211099969. The next prime is 121221211100057. The reversal of 121221211100002 is 200001112122121.

It can be written as a sum of positive squares in 4 ways, for example, as 12414636480481 + 108806574619521 = 3523441^2 + 10431039^2 .

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, 135586249 + ... + 136477372.

Almost surely, 2^{121221211100002} is an apocalyptic number.

121221211100002 is a deficient number, since it is larger than the sum of its proper divisors (74609095761110).

121221211100002 is a wasteful number, since it uses less digits than its factorization.

121221211100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272080773.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121221211100002 its reverse (200001112122121), we get a palindrome (321222323222123).

The spelling of 121221211100002 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred eleven million, one hundred thousand, two".