12220021001000 has 32 divisors (see below), whose sum is σ = 28594849144680. Its totient is φ = 4888008400000.

The previous prime is 12220021000961. The next prime is 12220021001047. The reversal of 12220021001000 is 10012002221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4990300274404 + 7229720726596 = 2233898^2 + 2688814^2 .

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, 6110009501 + ... + 6110011500.

Almost surely, 2^{12220021001000} is an apocalyptic number.

12220021001000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12220021001000 is an abundant number, since it is smaller than the sum of its proper divisors (16374828143680).

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

12220021001000 is a wasteful number, since it uses less digits than its factorization.

12220021001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12220021022 (or 12220021008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12220021001000 its reverse (10012002221), we get a palindrome (12230033003221).

The spelling of 12220021001000 in words is "twelve trillion, two hundred twenty billion, twenty-one million, one thousand".