121431221444 has 12 divisors (see below), whose sum is σ = 228851148204. Its totient is φ = 56045179104.

The previous prime is 121431221393. The next prime is 121431221449. The reversal of 121431221444 is 444122134121.

It can be written as a sum of positive squares in 2 ways, for example, as 52950612100 + 68480609344 = 230110^2 + 261688^2 .

It is not an unprimeable number, because it can be changed into a prime (121431221449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1167607847 + ... + 1167607950.

It is an arithmetic number, because the mean of its divisors is an integer number (19070929017).

Almost surely, 2^121431221444 is an apocalyptic number.

It is an amenable number.

121431221444 is a deficient number, since it is larger than the sum of its proper divisors (107419926760).

121431221444 is a wasteful number, since it uses less digits than its factorization.

121431221444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335215814 (or 2335215812 counting only the distinct ones).

The product of its digits is 6144, while the sum is 29.

Adding to 121431221444 its reverse (444122134121), we get a palindrome (565553355565).

The spelling of 121431221444 in words is "one hundred twenty-one billion, four hundred thirty-one million, two hundred twenty-one thousand, four hundred forty-four".