1211213323021 has 8 divisors (see below), whose sum is σ = 1361095908480. Its totient is φ = 1069432498992.

The previous prime is 1211213323009. The next prime is 1211213323037. The reversal of 1211213323021 is 1203233121121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211213323021 - 2²⁷ = 1211079105293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211213322983 and 1211213323001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211213323321) 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 7 ways as a sum of consecutive naturals, for example, 2025440041 + ... + 2025440638.

It is an arithmetic number, because the mean of its divisors is an integer number (170136988560).

Almost surely, 2^{1211213323021} is an apocalyptic number.

It is an amenable number.

1211213323021 is a deficient number, since it is larger than the sum of its proper divisors (149882585459).

1211213323021 is a wasteful number, since it uses less digits than its factorization.

1211213323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4050880715.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1211213323021 its reverse (1203233121121), we get a palindrome (2414446444142).

The spelling of 1211213323021 in words is "one trillion, two hundred eleven billion, two hundred thirteen million, three hundred twenty-three thousand, twenty-one".