121010002111021 has 2 divisors, whose sum is σ = 121010002111022. Its totient is φ = 121010002111020.

The previous prime is 121010002111003. The next prime is 121010002111087. The reversal of 121010002111021 is 120111200010121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120275330274121 + 734671836900 = 10967011^2 + 857130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121010002111021 is a prime.

It is a super-2 number, since 2×121010002111021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121010002110992 and 121010002111010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121010002111121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505001055510 + 60505001055511.

It is an arithmetic number, because the mean of its divisors is an integer number (60505001055511).

Almost surely, 2^{121010002111021} is an apocalyptic number.

It is an amenable number.

121010002111021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121010002111021 is an equidigital number, since it uses as much as digits as its factorization.

121010002111021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121010002111021 its reverse (120111200010121), we get a palindrome (241121202121142).

The spelling of 121010002111021 in words is "one hundred twenty-one trillion, ten billion, two million, one hundred eleven thousand, twenty-one".