10201001212121 has 2 divisors, whose sum is σ = 10201001212122. Its totient is φ = 10201001212120.

The previous prime is 10201001212117. The next prime is 10201001212151. The reversal of 10201001212121 is 12121210010201.

10201001212121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5461868140096 + 4739133072025 = 2337064^2 + 2176955^2 .

It is a cyclic number.

It is not a de Polignac number, because 10201001212121 - 2² = 10201001212117 is a prime.

It is a super-2 number, since 2×10201001212121² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10201001212096 and 10201001212105.

It is not a weakly prime, because it can be changed into another prime (10201001212151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100500606060 + 5100500606061.

It is an arithmetic number, because the mean of its divisors is an integer number (5100500606061).

Almost surely, 2^{10201001212121} is an apocalyptic number.

It is an amenable number.

10201001212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10201001212121 is an equidigital number, since it uses as much as digits as its factorization.

10201001212121 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 14.

Adding to 10201001212121 its reverse (12121210010201), we get a palindrome (22322211222322).

The spelling of 10201001212121 in words is "ten trillion, two hundred one billion, one million, two hundred twelve thousand, one hundred twenty-one".