121221000011012 has 18 divisors (see below), whose sum is σ = 233175105394014. Its totient is φ = 55100454550240.

The previous prime is 121221000011011. The next prime is 121221000011081. The reversal of 121221000011012 is 210110000122121.

It can be written as a sum of positive squares in only one way, i.e., 94458649992256 + 26762350018756 = 9718984^2 + 5173234^2 .

It is not an unprimeable number, because it can be changed into a prime (121221000011011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125228305313 + ... + 125228306280.

Almost surely, 2^{121221000011012} is an apocalyptic number.

It is an amenable number.

121221000011012 is a deficient number, since it is larger than the sum of its proper divisors (111954105383002).

121221000011012 is a wasteful number, since it uses less digits than its factorization.

121221000011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250456611619 (or 250456611606 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121221000011012 its reverse (210110000122121), we get a palindrome (331331000133133).

The spelling of 121221000011012 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, eleven thousand, twelve".