101211102121 has 2 divisors, whose sum is σ = 101211102122. Its totient is φ = 101211102120.

The previous prime is 101211102107. The next prime is 101211102143. The reversal of 101211102121 is 121201112101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56258621721 + 44952480400 = 237189^2 + 212020^2 .

It is a cyclic number.

It is not a de Polignac number, because 101211102121 - 2⁹ = 101211101609 is a prime.

It is not a weakly prime, because it can be changed into another prime (101211102101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605551060 + 50605551061.

It is an arithmetic number, because the mean of its divisors is an integer number (50605551061).

Almost surely, 2^101211102121 is an apocalyptic number.

It is an amenable number.

101211102121 is a deficient number, since it is larger than the sum of its proper divisors (1).

101211102121 is an equidigital number, since it uses as much as digits as its factorization.

101211102121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101211102121 its reverse (121201112101), we get a palindrome (222412214222).

The spelling of 101211102121 in words is "one hundred one billion, two hundred eleven million, one hundred two thousand, one hundred twenty-one".