1242205331553 has 48 divisors (see below), whose sum is σ = 1852944995200. Its totient is φ = 801319039488.

The previous prime is 1242205331551. The next prime is 1242205331579. The reversal of 1242205331553 is 3551335022421.

1242205331553 is a `hidden beast` number, since 1 + 2 + 4 + 2 + 20 + 53 + 31 + 553 = 666.

It is not a de Polignac number, because 1242205331553 - 2¹ = 1242205331551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242205331551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213178026 + ... + 213183852.

Almost surely, 2^{1242205331553} is an apocalyptic number.

It is an amenable number.

1242205331553 is a deficient number, since it is larger than the sum of its proper divisors (610739663647).

1242205331553 is a wasteful number, since it uses less digits than its factorization.

1242205331553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9286 (or 9283 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 1242205331553 in words is "one trillion, two hundred forty-two billion, two hundred five million, three hundred thirty-one thousand, five hundred fifty-three".