1303122321221 has 16 divisors (see below), whose sum is σ = 1559768567808. Its totient is φ = 1064455959600.

The previous prime is 1303122321211. The next prime is 1303122321229. The reversal of 1303122321221 is 1221232213031.

It is a cyclic number.

It is not a de Polignac number, because 1303122321221 - 2⁶ = 1303122321157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303122321229) 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, 14889815 + ... + 14977076.

It is an arithmetic number, because the mean of its divisors is an integer number (97485535488).

Almost surely, 2^{1303122321221} is an apocalyptic number.

It is an amenable number.

1303122321221 is a deficient number, since it is larger than the sum of its proper divisors (256646246587).

1303122321221 is a wasteful number, since it uses less digits than its factorization.

1303122321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29867192.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1303122321221 its reverse (1221232213031), we get a palindrome (2524354534252).

The spelling of 1303122321221 in words is "one trillion, three hundred three billion, one hundred twenty-two million, three hundred twenty-one thousand, two hundred twenty-one".