1221300313331 has 16 divisors (see below), whose sum is σ = 1440908206080. Its totient is φ = 1012981753440.

The previous prime is 1221300313313. The next prime is 1221300313357. The reversal of 1221300313331 is 1333130031221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221300313331 is a prime.

It is a super-2 number, since 2×1221300313331² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221300313297 and 1221300313306.

It is not an unprimeable number, because it can be changed into a prime (1221300310331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2680805 + ... + 3103113.

It is an arithmetic number, because the mean of its divisors is an integer number (90056762880).

Almost surely, 2^{1221300313331} is an apocalyptic number.

1221300313331 is a deficient number, since it is larger than the sum of its proper divisors (219607892749).

1221300313331 is a wasteful number, since it uses less digits than its factorization.

1221300313331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435674.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 1221300313331 its reverse (1333130031221), we get a palindrome (2554430344552).

The spelling of 1221300313331 in words is "one trillion, two hundred twenty-one billion, three hundred million, three hundred thirteen thousand, three hundred thirty-one".