1201430253556 has 24 divisors (see below), whose sum is σ = 2319459161544. Its totient is φ = 540981726720.

The previous prime is 1201430253533. The next prime is 1201430253559. The reversal of 1201430253556 is 6553520341021.

It can be written as a sum of positive squares in 4 ways, for example, as 31939408656 + 1169490844900 = 178716^2 + 1081430^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201430253559) 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, 281759185 + ... + 281763448.

It is an arithmetic number, because the mean of its divisors is an integer number (96644131731).

Almost surely, 2^{1201430253556} is an apocalyptic number.

It is an amenable number.

1201430253556 is a deficient number, since it is larger than the sum of its proper divisors (1118028907988).

1201430253556 is a wasteful number, since it uses less digits than its factorization.

1201430253556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563522691 (or 563522689 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

Adding to 1201430253556 its reverse (6553520341021), we get a palindrome (7754950594577).

The spelling of 1201430253556 in words is "one trillion, two hundred one billion, four hundred thirty million, two hundred fifty-three thousand, five hundred fifty-six".