1020011020021 has 24 divisors (see below), whose sum is σ = 1240323210240. Its totient is φ = 835381965600.

The previous prime is 1020011019977. The next prime is 1020011020031. The reversal of 1020011020021 is 1200201100201.

It is not a de Polignac number, because 1020011020021 - 2¹¹ = 1020011017973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020011020031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4130010 + ... + 4370011.

It is an arithmetic number, because the mean of its divisors is an integer number (51680133760).

Almost surely, 2^{1020011020021} is an apocalyptic number.

It is an amenable number.

1020011020021 is a deficient number, since it is larger than the sum of its proper divisors (220312190219).

1020011020021 is an equidigital number, since it uses as much as digits as its factorization.

1020011020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8500145 (or 8500138 counting only the distinct ones).

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

Adding to 1020011020021 its reverse (1200201100201), we get a palindrome (2220212120222).

The spelling of 1020011020021 in words is "one trillion, twenty billion, eleven million, twenty thousand, twenty-one".