1121001000012 has 48 divisors (see below), whose sum is σ = 2907325555680. Its totient is φ = 373535000064.

The previous prime is 1121000999959. The next prime is 1121001000017. The reversal of 1121001000012 is 2100001001211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1121000999958 and 1121001000003.

It is not an unprimeable number, because it can be changed into a prime (1121001000017) 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, 1525953 + ... + 2137880.

It is an arithmetic number, because the mean of its divisors is an integer number (60569282410).

Almost surely, 2^{1121001000012} is an apocalyptic number.

1121001000012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121001000012 is an abundant number, since it is smaller than the sum of its proper divisors (1786324555668).

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

1121001000012 is a wasteful number, since it uses less digits than its factorization.

1121001000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666679 (or 3666671 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1121001000012 its reverse (2100001001211), we get a palindrome (3221002001223).

The spelling of 1121001000012 in words is "one trillion, one hundred twenty-one billion, one million, twelve", and thus it is an aban number.