1221310201213 has 8 divisors (see below), whose sum is σ = 1276766315136.
Its totient is φ = 1166050393200.
The previous prime is 1221310201211. The next prime is 1221310201219. The reversal of 1221310201213 is 3121020131221.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 1221310201213 - 21 = 1221310201211 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 (1221310201211) 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, 49063753 + ... + 49088638.
It is an arithmetic number, because the mean of its divisors is an integer number (159595789392).
Almost surely, 21221310201213 is an apocalyptic number.
It is an amenable number.
1221310201213 is a deficient number, since it is larger than the sum of its proper divisors (55456113923).
1221310201213 is an equidigital number, since it uses as much as digits as its factorization.
1221310201213 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 98152955.
The product of its (nonzero) digits is 144, while the sum is 19.
Adding to 1221310201213 its reverse (3121020131221), we get a palindrome (4342330332434).
The spelling of 1221310201213 in words is "one trillion, two hundred twenty-one billion, three hundred ten million, two hundred one thousand, two hundred thirteen".