10002001121021 has 16 divisors (see below), whose sum is σ = 12311815778304. Its totient is φ = 7912603718784.

The previous prime is 10002001121017. The next prime is 10002001121059. The reversal of 10002001121021 is 12012110020001.

It is a cyclic number.

It is not a de Polignac number, because 10002001121021 - 2² = 10002001121017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10002001120993 and 10002001121011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002001021021) 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, 6734525 + ... + 8084418.

It is an arithmetic number, because the mean of its divisors is an integer number (769488486144).

Almost surely, 2^{10002001121021} is an apocalyptic number.

It is an amenable number.

10002001121021 is a deficient number, since it is larger than the sum of its proper divisors (2309814657283).

10002001121021 is a wasteful number, since it uses less digits than its factorization.

10002001121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14826380.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10002001121021 its reverse (12012110020001), we get a palindrome (22014111141022).

The spelling of 10002001121021 in words is "ten trillion, two billion, one million, one hundred twenty-one thousand, twenty-one".