1213031321211 has 8 divisors (see below), whose sum is σ = 1661087935504. Its totient is φ = 786831127200.

The previous prime is 1213031321123. The next prime is 1213031321357. The reversal of 1213031321211 is 1121231303121.

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

It is not a de Polignac number, because 1213031321211 - 2²³ = 1213022932603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213031321011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5464104940 + ... + 5464105161.

It is an arithmetic number, because the mean of its divisors is an integer number (207635991938).

Almost surely, 2^{1213031321211} is an apocalyptic number.

1213031321211 is a deficient number, since it is larger than the sum of its proper divisors (448056614293).

1213031321211 is a wasteful number, since it uses less digits than its factorization.

1213031321211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10928210141.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1213031321211 its reverse (1121231303121), we get a palindrome (2334262624332).

The spelling of 1213031321211 in words is "one trillion, two hundred thirteen billion, thirty-one million, three hundred twenty-one thousand, two hundred eleven".