101210121161 has 2 divisors, whose sum is σ = 101210121162. Its totient is φ = 101210121160.

The previous prime is 101210121143. The next prime is 101210121209. The reversal of 101210121161 is 161121012101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54175355536 + 47034765625 = 232756^2 + 216875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101210121161 is a prime.

It is not a weakly prime, because it can be changed into another prime (101210141161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605060580 + 50605060581.

It is an arithmetic number, because the mean of its divisors is an integer number (50605060581).

Almost surely, 2^101210121161 is an apocalyptic number.

It is an amenable number.

101210121161 is a deficient number, since it is larger than the sum of its proper divisors (1).

101210121161 is an equidigital number, since it uses as much as digits as its factorization.

101210121161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 101210121161 its reverse (161121012101), we get a palindrome (262331133262).

The spelling of 101210121161 in words is "one hundred one billion, two hundred ten million, one hundred twenty-one thousand, one hundred sixty-one".