1001020010021 has 8 divisors (see below), whose sum is σ = 1022722642944. Its totient is φ = 979533324000.

The previous prime is 1001020010009. The next prime is 1001020010041. The reversal of 1001020010021 is 1200100201001.

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 1001020010021 - 2²² = 1001015815717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001020009990 and 1001020010008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001020010041) 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, 53977355 + ... + 53995896.

It is an arithmetic number, because the mean of its divisors is an integer number (127840330368).

Almost surely, 2^{1001020010021} is an apocalyptic number.

It is an amenable number.

1001020010021 is a deficient number, since it is larger than the sum of its proper divisors (21702632923).

1001020010021 is a wasteful number, since it uses less digits than its factorization.

1001020010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107973451.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1001020010021 its reverse (1200100201001), we get a palindrome (2201120211022).

The spelling of 1001020010021 in words is "one trillion, one billion, twenty million, ten thousand, twenty-one".