1231221104430 has 32 divisors (see below), whose sum is σ = 2990532230784. Its totient is φ = 324369896736.

The previous prime is 1231221104423. The next prime is 1231221104447. The reversal of 1231221104430 is 344011221321.

It is a self number, because there is not a number n which added to its sum of digits gives 1231221104430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247230664 + ... + 247235643.

It is an arithmetic number, because the mean of its divisors is an integer number (93454132212).

Almost surely, 2^{1231221104430} is an apocalyptic number.

1231221104430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231221104430 is an abundant number, since it is smaller than the sum of its proper divisors (1759311126354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231221104430 is a wasteful number, since it uses less digits than its factorization.

1231221104430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494466400.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1231221104430 its reverse (344011221321), we get a palindrome (1575232325751).

The spelling of 1231221104430 in words is "one trillion, two hundred thirty-one billion, two hundred twenty-one million, one hundred four thousand, four hundred thirty".