102121212212101 has 4 divisors (see below), whose sum is σ = 102121333307104. Its totient is φ = 102121091117100.

The previous prime is 102121212212053. The next prime is 102121212212179. The reversal of 102121212212101 is 101212212121201.

It is a happy number.

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 102121212212101 - 2²⁹ = 102120675341189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121212212501) 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, 59273595 + ... + 60972136.

It is an arithmetic number, because the mean of its divisors is an integer number (25530333326776).

Almost surely, 2^{102121212212101} is an apocalyptic number.

It is an amenable number.

102121212212101 is a deficient number, since it is larger than the sum of its proper divisors (121095003).

102121212212101 is an equidigital number, since it uses as much as digits as its factorization.

102121212212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121095002.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 102121212212101 its reverse (101212212121201), we get a palindrome (203333424333302).

The spelling of 102121212212101 in words is "one hundred two trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twelve thousand, one hundred one".