20100012021121 has 2 divisors, whose sum is σ = 20100012021122. Its totient is φ = 20100012021120.

The previous prime is 20100012020993. The next prime is 20100012021163. The reversal of 20100012021121 is 12112021000102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19362543283521 + 737468737600 = 4400289^2 + 858760^2 .

It is a cyclic number.

It is not a de Polignac number, because 20100012021121 - 2⁷ = 20100012020993 is a prime.

It is not a weakly prime, because it can be changed into another prime (20100012021191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050006010560 + 10050006010561.

It is an arithmetic number, because the mean of its divisors is an integer number (10050006010561).

Almost surely, 2^{20100012021121} is an apocalyptic number.

It is an amenable number.

20100012021121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100012021121 is an equidigital number, since it uses as much as digits as its factorization.

20100012021121 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 20100012021121 its reverse (12112021000102), we get a palindrome (32212033021223).

The spelling of 20100012021121 in words is "twenty trillion, one hundred billion, twelve million, twenty-one thousand, one hundred twenty-one".