21020332001000 has 32 divisors (see below), whose sum is σ = 49187576884680. Its totient is φ = 8408132800000.

The previous prime is 21020332000991. The next prime is 21020332001021. The reversal of 21020332001000 is 10023302012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9640490947396 + 11379841053604 = 3104914^2 + 3373402^2 .

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, 10510165001 + ... + 10510167000.

Almost surely, 2^{21020332001000} is an apocalyptic number.

21020332001000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020332001000 is an abundant number, since it is smaller than the sum of its proper divisors (28167244883680).

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

21020332001000 is a wasteful number, since it uses less digits than its factorization.

21020332001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21020332022 (or 21020332008 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21020332001000 its reverse (10023302012), we get a palindrome (21030355303012).

The spelling of 21020332001000 in words is "twenty-one trillion, twenty billion, three hundred thirty-two million, one thousand".