1244211231555 has 16 divisors (see below), whose sum is σ = 2211931078560. Its totient is φ = 663579323424.

The previous prime is 1244211231533. The next prime is 1244211231583. The reversal of 1244211231555 is 5551321124421.

1244211231555 is a `hidden beast` number, since 1 + 2 + 44 + 21 + 12 + 31 + 555 = 666.

It is not a de Polignac number, because 1244211231555 - 2⁶ = 1244211231491 is a prime.

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, 4608189612 + ... + 4608189881.

It is an arithmetic number, because the mean of its divisors is an integer number (138245692410).

Almost surely, 2^{1244211231555} is an apocalyptic number.

1244211231555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1244211231555 is a deficient number, since it is larger than the sum of its proper divisors (967719847005).

1244211231555 is an equidigital number, since it uses as much as digits as its factorization.

1244211231555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9216379507 (or 9216379501 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

Adding to 1244211231555 its reverse (5551321124421), we get a palindrome (6795532355976).

The spelling of 1244211231555 in words is "one trillion, two hundred forty-four billion, two hundred eleven million, two hundred thirty-one thousand, five hundred fifty-five".