1020021122021 has 16 divisors (see below), whose sum is σ = 1148625878400. Its totient is φ = 897650066880.

The previous prime is 1020021122011. The next prime is 1020021122033. The reversal of 1020021122021 is 1202211200201.

It is a cyclic number.

It is not a de Polignac number, because 1020021122021 - 2²² = 1020016927717 is a prime.

It is a super-2 number, since 2×1020021122021² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1020021121987 and 1020021122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020021122011) 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, 6280721 + ... + 6441078.

It is an arithmetic number, because the mean of its divisors is an integer number (71789117400).

Almost surely, 2^{1020021122021} is an apocalyptic number.

1020021122021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1020021122021 is a deficient number, since it is larger than the sum of its proper divisors (128604756379).

1020021122021 is a wasteful number, since it uses less digits than its factorization.

1020021122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12722044.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1020021122021 its reverse (1202211200201), we get a palindrome (2222232322222).

The spelling of 1020021122021 in words is "one trillion, twenty billion, twenty-one million, one hundred twenty-two thousand, twenty-one".