1221312143432 has 32 divisors (see below), whose sum is σ = 2301708467520. Its totient is φ = 607528776000.

The previous prime is 1221312143411. The next prime is 1221312143437. The reversal of 1221312143432 is 2343412131221.

It is a happy number.

It is a super-2 number, since 2×1221312143432² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221312143395 and 1221312143404.

It is not an unprimeable number, because it can be changed into a prime (1221312143437) 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, 1414253 + ... + 2107779.

It is an arithmetic number, because the mean of its divisors is an integer number (71928389610).

Almost surely, 2^{1221312143432} is an apocalyptic number.

It is an amenable number.

1221312143432 is a deficient number, since it is larger than the sum of its proper divisors (1080396324088).

1221312143432 is a wasteful number, since it uses less digits than its factorization.

1221312143432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694661 (or 694657 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

Adding to 1221312143432 its reverse (2343412131221), we get a palindrome (3564724274653).

The spelling of 1221312143432 in words is "one trillion, two hundred twenty-one billion, three hundred twelve million, one hundred forty-three thousand, four hundred thirty-two".