1253221745018 has 32 divisors (see below), whose sum is σ = 1901210572800. Its totient is φ = 619511348736.

The previous prime is 1253221744963. The next prime is 1253221745023. The reversal of 1253221745018 is 8105471223521.

It is a happy number.

It is a super-2 number, since 2×1253221745018² (a number of 25 digits) contains 22 as substring.

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, 373092023 + ... + 373095381.

It is an arithmetic number, because the mean of its divisors is an integer number (59412830400).

Almost surely, 2^{1253221745018} is an apocalyptic number.

1253221745018 is a deficient number, since it is larger than the sum of its proper divisors (647988827782).

1253221745018 is a wasteful number, since it uses less digits than its factorization.

1253221745018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6686.

The product of its (nonzero) digits is 134400, while the sum is 41.

Adding to 1253221745018 its reverse (8105471223521), we get a palindrome (9358692968539).

The spelling of 1253221745018 in words is "one trillion, two hundred fifty-three billion, two hundred twenty-one million, seven hundred forty-five thousand, eighteen".