1321021225124 has 6 divisors (see below), whose sum is σ = 2311787143974. Its totient is φ = 660510612560.

The previous prime is 1321021225087. The next prime is 1321021225127. The reversal of 1321021225124 is 4215221201231.

It can be written as a sum of positive squares in only one way, i.e., 1294315782400 + 26705442724 = 1137680^2 + 163418^2 .

It is a super-2 number, since 2×1321021225124² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321021225093 and 1321021225102.

It is not an unprimeable number, because it can be changed into a prime (1321021225127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165127653137 + ... + 165127653144.

It is an arithmetic number, because the mean of its divisors is an integer number (385297857329).

Almost surely, 2^{1321021225124} is an apocalyptic number.

It is an amenable number.

1321021225124 is a deficient number, since it is larger than the sum of its proper divisors (990765918850).

1321021225124 is a wasteful number, since it uses less digits than its factorization.

1321021225124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330255306285 (or 330255306283 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 1321021225124 its reverse (4215221201231), we get a palindrome (5536242426355).

The spelling of 1321021225124 in words is "one trillion, three hundred twenty-one billion, twenty-one million, two hundred twenty-five thousand, one hundred twenty-four".