1321221122131 has 8 divisors (see below), whose sum is σ = 1376613428400. Its totient is φ = 1266484346400.

The previous prime is 1321221122009. The next prime is 1321221122233. The reversal of 1321221122131 is 1312211221231.

It is a happy number.

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 1321221122131 - 2⁷ = 1321221122003 is a prime.

It is a super-2 number, since 2×1321221122131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321221128131) 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, 163878520 + ... + 163886581.

It is an arithmetic number, because the mean of its divisors is an integer number (172076678550).

Almost surely, 2^{1321221122131} is an apocalyptic number.

1321221122131 is a deficient number, since it is larger than the sum of its proper divisors (55392306269).

1321221122131 is a wasteful number, since it uses less digits than its factorization.

1321221122131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327765269.

The product of its digits is 288, while the sum is 22.

Adding to 1321221122131 its reverse (1312211221231), we get a palindrome (2633432343362).

The spelling of 1321221122131 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred thirty-one".