1101212210221 has 4 divisors (see below), whose sum is σ = 1101986078272. Its totient is φ = 1100438342172.

The previous prime is 1101212210209. The next prime is 1101212210237. The reversal of 1101212210221 is 1220122121011.

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 a de Polignac number, because none of the positive numbers 2^k-1101212210221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101212210195 and 1101212210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101212210521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386931891 + ... + 386934736.

It is an arithmetic number, because the mean of its divisors is an integer number (275496519568).

Almost surely, 2^{1101212210221} is an apocalyptic number.

It is an amenable number.

1101212210221 is a deficient number, since it is larger than the sum of its proper divisors (773868051).

1101212210221 is an equidigital number, since it uses as much as digits as its factorization.

1101212210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773868050.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1101212210221 its reverse (1220122121011), we get a palindrome (2321334331232).

The spelling of 1101212210221 in words is "one trillion, one hundred one billion, two hundred twelve million, two hundred ten thousand, two hundred twenty-one".