101212120121 has 4 divisors (see below), whose sum is σ = 115670994432. Its totient is φ = 86753245812.

The previous prime is 101212120073. The next prime is 101212120147. The reversal of 101212120121 is 121021212101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101212120121 - 2¹⁰ = 101212119097 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101212120096 and 101212120105.

It is not an unprimeable number, because it can be changed into a prime (101212120151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7229437145 + ... + 7229437158.

It is an arithmetic number, because the mean of its divisors is an integer number (28917748608).

Almost surely, 2^101212120121 is an apocalyptic number.

It is an amenable number.

101212120121 is a deficient number, since it is larger than the sum of its proper divisors (14458874311).

101212120121 is an equidigital number, since it uses as much as digits as its factorization.

101212120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14458874310.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 101212120121 its reverse (121021212101), we get a palindrome (222233332222).

The spelling of 101212120121 in words is "one hundred one billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty-one".