101212122002221 has 4 divisors (see below), whose sum is σ = 101213574245212. Its totient is φ = 101210669759232.

The previous prime is 101212122002213. The next prime is 101212122002273. The reversal of 101212122002221 is 122200221212101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81417506617225 + 19794615384996 = 9023165^2 + 4449114^2 .

It is a cyclic number.

It is not a de Polignac number, because 101212122002221 - 2³ = 101212122002213 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 (101212122002921) 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, 726016950 + ... + 726156343.

It is an arithmetic number, because the mean of its divisors is an integer number (25303393561303).

Almost surely, 2^{101212122002221} is an apocalyptic number.

It is an amenable number.

101212122002221 is a deficient number, since it is larger than the sum of its proper divisors (1452242991).

101212122002221 is an equidigital number, since it uses as much as digits as its factorization.

101212122002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452242990.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 101212122002221 its reverse (122200221212101), we get a palindrome (223412343214322).

The spelling of 101212122002221 in words is "one hundred one trillion, two hundred twelve billion, one hundred twenty-two million, two thousand, two hundred twenty-one".