1000032100021 has 8 divisors (see below), whose sum is σ = 1009976000184. Its totient is φ = 990089035200.

The previous prime is 1000032100019. The next prime is 1000032100027. The reversal of 1000032100021 is 1200012300001.

It can be written as a sum of positive squares in 4 ways, for example, as 655274060100 + 344758039921 = 809490^2 + 587161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1000032100021 - 2¹ = 1000032100019 is a prime.

It is a super-2 number, since 2×1000032100021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000032099980 and 1000032100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000032100027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2352771 + ... + 2745103.

It is an arithmetic number, because the mean of its divisors is an integer number (126247000023).

Almost surely, 2^{1000032100021} is an apocalyptic number.

It is an amenable number.

1000032100021 is a deficient number, since it is larger than the sum of its proper divisors (9943900163).

1000032100021 is a wasteful number, since it uses less digits than its factorization.

1000032100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417671.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 1000032100021 its reverse (1200012300001), we get a palindrome (2200044400022).

The spelling of 1000032100021 in words is "one trillion, thirty-two million, one hundred thousand, twenty-one".