1001121312 has 24 divisors (see below), whose sum is σ = 2627943696. Its totient is φ = 333707072.

The previous prime is 1001121283. The next prime is 1001121323. The reversal of 1001121312 is 2131211001.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5214078 + ... + 5214269.

It is an arithmetic number, because the mean of its divisors is an integer number (109497654).

Almost surely, 2^1001121312 is an apocalyptic number.

1001121312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1001121312 is an abundant number, since it is smaller than the sum of its proper divisors (1626822384).

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

1001121312 is a wasteful number, since it uses less digits than its factorization.

1001121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10428360 (or 10428352 counting only the distinct ones).

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

The square root of 1001121312 is about 31640.5011338316. The cubic root of 1001121312 is about 1000.3736310491.

Adding to 1001121312 its reverse (2131211001), we get a palindrome (3132332313).

The spelling of 1001121312 in words is "one billion, one million, one hundred twenty-one thousand, three hundred twelve".