12021110001000 has 96 divisors (see below), whose sum is σ = 40631351833800. Its totient is φ = 3205629331200.

The previous prime is 12021110000987. The next prime is 12021110001037. The reversal of 12021110001000 is 10001112021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7405375723524 + 4615734277476 = 2721282^2 + 2148426^2 .

It is a super-2 number, since 2×12021110001000² (a number of 27 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 667830445 + ... + 667848444.

Almost surely, 2^{12021110001000} is an apocalyptic number.

12021110001000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021110001000 is an abundant number, since it is smaller than the sum of its proper divisors (28610241832800).

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

12021110001000 is a wasteful number, since it uses less digits than its factorization.

12021110001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335678916 (or 1335678899 counting only the distinct ones).

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

Adding to 12021110001000 its reverse (10001112021), we get a palindrome (12031111113021).

The spelling of 12021110001000 in words is "twelve trillion, twenty-one billion, one hundred ten million, one thousand".