12101002021 has 2 divisors, whose sum is σ = 12101002022. Its totient is φ = 12101002020.

The previous prime is 12101001989. The next prime is 12101002073. The reversal of 12101002021 is 12020010121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11403249796 + 697752225 = 106786^2 + 26415^2 .

It is a cyclic number.

It is not a de Polignac number, because 12101002021 - 2⁵ = 12101001989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12101001989 and 12101002007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12101002621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050501010 + 6050501011.

It is an arithmetic number, because the mean of its divisors is an integer number (6050501011).

Almost surely, 2^12101002021 is an apocalyptic number.

It is an amenable number.

12101002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101002021 is an equidigital number, since it uses as much as digits as its factorization.

12101002021 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 10.

Adding to 12101002021 its reverse (12020010121), we get a palindrome (24121012142).

It can be divided in two parts, 1210100 and 2021, that added together give a palindrome (1212121).

The spelling of 12101002021 in words is "twelve billion, one hundred one million, two thousand, twenty-one".