1201231455240 has 64 divisors (see below), whose sum is σ = 3603980016000. Its totient is φ = 320302996992.

The previous prime is 1201231455217. The next prime is 1201231455241. The reversal of 1201231455240 is 425541321021.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1201231455198 and 1201231455207.

It is not an unprimeable number, because it can be changed into a prime (1201231455241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1148436 + ... + 1929084.

It is an arithmetic number, because the mean of its divisors is an integer number (56312187750).

Almost surely, 2^{1201231455240} is an apocalyptic number.

1201231455240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201231455240 is an abundant number, since it is smaller than the sum of its proper divisors (2402748560760).

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

1201231455240 is a wasteful number, since it uses less digits than its factorization.

1201231455240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793486 (or 793482 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 1201231455240 its reverse (425541321021), we get a palindrome (1626772776261).

The spelling of 1201231455240 in words is "one trillion, two hundred one billion, two hundred thirty-one million, four hundred fifty-five thousand, two hundred forty".