1211213322101 has 4 divisors (see below), whose sum is σ = 1263874770912. Its totient is φ = 1158551873292.

The previous prime is 1211213322091. The next prime is 1211213322107. The reversal of 1211213322101 is 1012233121121.

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 1211213322101 - 2¹⁰ = 1211213321077 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 (1211213322107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26330724371 + ... + 26330724416.

It is an arithmetic number, because the mean of its divisors is an integer number (315968692728).

Almost surely, 2^{1211213322101} is an apocalyptic number.

It is an amenable number.

1211213322101 is a deficient number, since it is larger than the sum of its proper divisors (52661448811).

1211213322101 is an equidigital number, since it uses as much as digits as its factorization.

1211213322101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52661448810.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1211213322101 its reverse (1012233121121), we get a palindrome (2223446443222).

It can be divided in two parts, 1211 and 213322101, that added together give a palindrome (213323312).

The spelling of 1211213322101 in words is "one trillion, two hundred eleven billion, two hundred thirteen million, three hundred twenty-two thousand, one hundred one".