121221020210113 has 2 divisors, whose sum is σ = 121221020210114. Its totient is φ = 121221020210112.

The previous prime is 121221020210099. The next prime is 121221020210201. The reversal of 121221020210113 is 311012020122121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111158370389889 + 10062649820224 = 10543167^2 + 3172168^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121221020210113 is a prime.

It is a super-3 number, since 3×121221020210113³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (121221020210513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610510105056 + 60610510105057.

It is an arithmetic number, because the mean of its divisors is an integer number (60610510105057).

Almost surely, 2^{121221020210113} is an apocalyptic number.

It is an amenable number.

121221020210113 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221020210113 is an equidigital number, since it uses as much as digits as its factorization.

121221020210113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 121221020210113 its reverse (311012020122121), we get a palindrome (432233040332234).

The spelling of 121221020210113 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred ten thousand, one hundred thirteen".