1201001042320 has 40 divisors (see below), whose sum is σ = 2811067903800. Its totient is φ = 477176248320.

The previous prime is 1201001042299. The next prime is 1201001042321. The reversal of 1201001042320 is 232401001021.

It can be written as a sum of positive squares in 4 ways, for example, as 68189921424 + 1132811120896 = 261132^2 + 1064336^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1201001042294 and 1201001042303.

It is not an unprimeable number, because it can be changed into a prime (1201001042321) 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, 50365641 + ... + 50389480.

It is an arithmetic number, because the mean of its divisors is an integer number (70276697595).

Almost surely, 2^{1201001042320} is an apocalyptic number.

1201001042320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201001042320 is an abundant number, since it is smaller than the sum of its proper divisors (1610066861480).

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

1201001042320 is a wasteful number, since it uses less digits than its factorization.

1201001042320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100755283 (or 100755277 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1201001042320 its reverse (232401001021), we get a palindrome (1433402043341).

The spelling of 1201001042320 in words is "one trillion, two hundred one billion, one million, forty-two thousand, three hundred twenty".