1011020200021 has 8 divisors (see below), whose sum is σ = 1088873090144. Its totient is φ = 933179039280.

The previous prime is 1011020199997. The next prime is 1011020200049. The reversal of 1011020200021 is 1200020201101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011020200021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011020199980 and 1011020200007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011020200321) 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, 2752911 + ... + 3098476.

It is an arithmetic number, because the mean of its divisors is an integer number (136109136268).

Almost surely, 2^{1011020200021} is an apocalyptic number.

It is an amenable number.

1011020200021 is a deficient number, since it is larger than the sum of its proper divisors (77852890123).

1011020200021 is a wasteful number, since it uses less digits than its factorization.

1011020200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5864691.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1011020200021 its reverse (1200020201101), we get a palindrome (2211040401122).

The spelling of 1011020200021 in words is "one trillion, eleven billion, twenty million, two hundred thousand, twenty-one".