1212301010021 has 2 divisors, whose sum is σ = 1212301010022. Its totient is φ = 1212301010020.

The previous prime is 1212301010003. The next prime is 1212301010051. The reversal of 1212301010021 is 1200101032121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 643613085025 + 568687924996 = 802255^2 + 754114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212301010021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212301009978 and 1212301010005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212301010051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606150505010 + 606150505011.

It is an arithmetic number, because the mean of its divisors is an integer number (606150505011).

Almost surely, 2^{1212301010021} is an apocalyptic number.

It is an amenable number.

1212301010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212301010021 is an equidigital number, since it uses as much as digits as its factorization.

1212301010021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1212301010021 its reverse (1200101032121), we get a palindrome (2412402042142).

The spelling of 1212301010021 in words is "one trillion, two hundred twelve billion, three hundred one million, ten thousand, twenty-one".