1201011320 has 32 divisors (see below), whose sum is σ = 2730142800. Its totient is φ = 475450368.

The previous prime is 1201011311. The next prime is 1201011349. The reversal of 1201011320 is 231101021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150890 + ... + 158649.

Almost surely, 2^1201011320 is an apocalyptic number.

1201011320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201011320 is an abundant number, since it is smaller than the sum of its proper divisors (1529131480).

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

1201011320 is a wasteful number, since it uses less digits than its factorization.

1201011320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309647 (or 309643 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1201011320 is about 34655.6102240315. The cubic root of 1201011320 is about 1062.9570097664.

Adding to 1201011320 its reverse (231101021), we get a palindrome (1432112341).

The spelling of 1201011320 in words is "one billion, two hundred one million, eleven thousand, three hundred twenty".