121020002019121 has 2 divisors, whose sum is σ = 121020002019122. Its totient is φ = 121020002019120.

The previous prime is 121020002019109. The next prime is 121020002019167. The reversal of 121020002019121 is 121910200020121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111557217064225 + 9462784954896 = 10562065^2 + 3076164^2 .

It is a cyclic number.

It is not a de Polignac number, because 121020002019121 - 2¹⁵ = 121020001986353 is a prime.

It is a super-2 number, since 2×121020002019121² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121020002019092 and 121020002019101.

It is not a weakly prime, because it can be changed into another prime (121020002089121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510001009560 + 60510001009561.

It is an arithmetic number, because the mean of its divisors is an integer number (60510001009561).

Almost surely, 2^{121020002019121} is an apocalyptic number.

It is an amenable number.

121020002019121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121020002019121 is an equidigital number, since it uses as much as digits as its factorization.

121020002019121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 121020002019121 its reverse (121910200020121), we get a palindrome (242930202039242).

The spelling of 121020002019121 in words is "one hundred twenty-one trillion, twenty billion, two million, nineteen thousand, one hundred twenty-one".