1200071271421 has 8 divisors (see below), whose sum is σ = 1309488564384. Its totient is φ = 1090707295920.

The previous prime is 1200071271367. The next prime is 1200071271463. The reversal of 1200071271421 is 1241721700021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1200071271421 - 2²⁵ = 1200037716989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1200071271421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200071271491) 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, 13282291 + ... + 13372336.

It is an arithmetic number, because the mean of its divisors is an integer number (163686070548).

Almost surely, 2^{1200071271421} is an apocalyptic number.

1200071271421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200071271421 is a deficient number, since it is larger than the sum of its proper divisors (109417292963).

1200071271421 is a wasteful number, since it uses less digits than its factorization.

1200071271421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26658731.

The product of its (nonzero) digits is 1568, while the sum is 28.

Adding to 1200071271421 its reverse (1241721700021), we get a palindrome (2441792971442).

The spelling of 1200071271421 in words is "one trillion, two hundred billion, seventy-one million, two hundred seventy-one thousand, four hundred twenty-one".