12021101000 has 64 divisors (see below), whose sum is σ = 28147841280. Its totient is φ = 4805284800.

The previous prime is 12021100997. The next prime is 12021101003. The reversal of 12021101000 is 10112021.

It is an interprime number because it is at equal distance from previous prime (12021100997) and next prime (12021101003).

It is a Harshad number since it is a multiple of its sum of digits (8).

It is not an unprimeable number, because it can be changed into a prime (12021101003) 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, 2060087 + ... + 2065913.

It is an arithmetic number, because the mean of its divisors is an integer number (439810020).

Almost surely, 2^12021101000 is an apocalyptic number.

12021101000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12021101000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14073920640).

12021101000 is an abundant number, since it is smaller than the sum of its proper divisors (16126740280).

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

12021101000 is a wasteful number, since it uses less digits than its factorization.

12021101000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7911 (or 7897 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 12021101000 its reverse (10112021), we get a palindrome (12031213021).

The spelling of 12021101000 in words is "twelve billion, twenty-one million, one hundred one thousand".