1020210111021 has 16 divisors (see below), whose sum is σ = 1363017674240. Its totient is φ = 678772424880.

The previous prime is 1020210111013. The next prime is 1020210111031. The reversal of 1020210111021 is 1201110120201.

It is not a de Polignac number, because 1020210111021 - 2³ = 1020210111013 is a prime.

It is a super-2 number, since 2×1020210111021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020210110988 and 1020210111006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020210111031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3558150 + ... + 3834168.

It is an arithmetic number, because the mean of its divisors is an integer number (85188604640).

Almost surely, 2^{1020210111021} is an apocalyptic number.

It is an amenable number.

1020210111021 is a deficient number, since it is larger than the sum of its proper divisors (342807563219).

1020210111021 is a wasteful number, since it uses less digits than its factorization.

1020210111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278496.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1020210111021 its reverse (1201110120201), we get a palindrome (2221320231222).

The spelling of 1020210111021 in words is "one trillion, twenty billion, two hundred ten million, one hundred eleven thousand, twenty-one".