1221331223301 has 16 divisors (see below), whose sum is σ = 1925251190400. Its totient is φ = 673837915968.

The previous prime is 1221331223291. The next prime is 1221331223317. The reversal of 1221331223301 is 1033221331221.

It is not a de Polignac number, because 1221331223301 - 2¹⁵ = 1221331190533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221331223201) 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, 1002734386 + ... + 1002735603.

It is an arithmetic number, because the mean of its divisors is an integer number (120328199400).

Almost surely, 2^{1221331223301} is an apocalyptic number.

It is an amenable number.

1221331223301 is a deficient number, since it is larger than the sum of its proper divisors (703919967099).

1221331223301 is a wasteful number, since it uses less digits than its factorization.

1221331223301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005470028.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1221331223301 its reverse (1033221331221), we get a palindrome (2254552554522).

The spelling of 1221331223301 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-one million, two hundred twenty-three thousand, three hundred one".