1221321001310 has 8 divisors (see below), whose sum is σ = 2198377802376. Its totient is φ = 488528400520.

The previous prime is 1221321001309. The next prime is 1221321001337. The reversal of 1221321001310 is 131001231221.

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

It is a super-2 number, since 2×1221321001310² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61066050056 + ... + 61066050075.

It is an arithmetic number, because the mean of its divisors is an integer number (274797225297).

Almost surely, 2^{1221321001310} is an apocalyptic number.

1221321001310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221321001310 is a deficient number, since it is larger than the sum of its proper divisors (977056801066).

1221321001310 is a wasteful number, since it uses less digits than its factorization.

1221321001310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122132100138.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1221321001310 its reverse (131001231221), we get a palindrome (1352322232531).

The spelling of 1221321001310 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-one million, one thousand, three hundred ten".