1201311421000 has 64 divisors (see below), whose sum is σ = 2816116832880. Its totient is φ = 479661644800.

The previous prime is 1201311420989. The next prime is 1201311421007. The reversal of 1201311421000 is 1241131021.

It can be written as a sum of positive squares in 8 ways, for example, as 69526087684 + 1131785333316 = 263678^2 + 1063854^2 .

It is not an unprimeable number, because it can be changed into a prime (1201311421007) 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, 521377 + ... + 1635376.

Almost surely, 2^{1201311421000} is an apocalyptic number.

1201311421000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201311421000 is an abundant number, since it is smaller than the sum of its proper divisors (1614805411880).

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

1201311421000 is a wasteful number, since it uses less digits than its factorization.

1201311421000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2157331 (or 2157317 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1201311421000 its reverse (1241131021), we get a palindrome (1202552552021).

The spelling of 1201311421000 in words is "one trillion, two hundred one billion, three hundred eleven million, four hundred twenty-one thousand".