10002021020001 has 16 divisors (see below), whose sum is σ = 14817946228800. Its totient is φ = 6667952223744.

The previous prime is 10002021019927. The next prime is 10002021020023. The reversal of 10002021020001 is 10002012020001.

It is not a de Polignac number, because 10002021020001 - 2¹⁹ = 10002020495713 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (10002021020701) 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, 1350945 + ... + 4672161.

It is an arithmetic number, because the mean of its divisors is an integer number (926121639300).

Almost surely, 2^{10002021020001} is an apocalyptic number.

It is an amenable number.

10002021020001 is a deficient number, since it is larger than the sum of its proper divisors (4815925208799).

10002021020001 is a wasteful number, since it uses less digits than its factorization.

10002021020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3432765 (or 3432759 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10002021020001 its reverse (10002012020001), we get a palindrome (20004033040002).

Subtracting from 10002021020001 its reverse (10002012020001), we obtain a square (9000000 = 3000²).

The spelling of 10002021020001 in words is "ten trillion, two billion, twenty-one million, twenty thousand, one".