101011210121 has 2 divisors, whose sum is σ = 101011210122. Its totient is φ = 101011210120.

The previous prime is 101011210051. The next prime is 101011210129. The reversal of 101011210121 is 121012110101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99357974521 + 1653235600 = 315211^2 + 40660^2 .

It is an emirp because it is prime and its reverse (121012110101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101011210121 - 2³⁰ = 99937468297 is a prime.

It is not a weakly prime, because it can be changed into another prime (101011210129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50505605060 + 50505605061.

It is an arithmetic number, because the mean of its divisors is an integer number (50505605061).

Almost surely, 2^101011210121 is an apocalyptic number.

It is an amenable number.

101011210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

101011210121 is an equidigital number, since it uses as much as digits as its factorization.

101011210121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 101011210121 its reverse (121012110101), we get a palindrome (222023320222).

It can be divided in two parts, 10101 and 1210121, that multiplied together give a palindrome (12223432221).

The spelling of 101011210121 in words is "one hundred one billion, eleven million, two hundred ten thousand, one hundred twenty-one".