10120001002021 has 2 divisors, whose sum is σ = 10120001002022. Its totient is φ = 10120001002020.

The previous prime is 10120001001967. The next prime is 10120001002057. The reversal of 10120001002021 is 12020010002101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10061901202500 + 58099799521 = 3172050^2 + 241039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10120001002021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10120001001989 and 10120001002007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10120001002121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060000501010 + 5060000501011.

It is an arithmetic number, because the mean of its divisors is an integer number (5060000501011).

Almost surely, 2^{10120001002021} is an apocalyptic number.

It is an amenable number.

10120001002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10120001002021 is an equidigital number, since it uses as much as digits as its factorization.

10120001002021 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 10120001002021 its reverse (12020010002101), we get a palindrome (22140011004122).

The spelling of 10120001002021 in words is "ten trillion, one hundred twenty billion, one million, two thousand, twenty-one".