121012102021 has 2 divisors, whose sum is σ = 121012102022. Its totient is φ = 121012102020.

The previous prime is 121012102007. The next prime is 121012102037. The reversal of 121012102021 is 120201210121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89430902500 + 31581199521 = 299050^2 + 177711^2 .

It is a cyclic number.

It is not a de Polignac number, because 121012102021 - 2¹⁷ = 121011970949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121012101992 and 121012102010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121012102051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506051010 + 60506051011.

It is an arithmetic number, because the mean of its divisors is an integer number (60506051011).

Almost surely, 2^121012102021 is an apocalyptic number.

It is an amenable number.

121012102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012102021 is an equidigital number, since it uses as much as digits as its factorization.

121012102021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121012102021 its reverse (120201210121), we get a palindrome (241213312142).

The spelling of 121012102021 in words is "one hundred twenty-one billion, twelve million, one hundred two thousand, twenty-one".