1021110202021 has 16 divisors (see below), whose sum is σ = 1264461165184. Its totient is φ = 802954845504.

The previous prime is 1021110202019. The next prime is 1021110202033. The reversal of 1021110202021 is 1202020111201.

It is not a de Polignac number, because 1021110202021 - 2¹ = 1021110202019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 1021110201992 and 1021110202010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021110202061) 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, 34405386 + ... + 34435051.

It is an arithmetic number, because the mean of its divisors is an integer number (79028822824).

Almost surely, 2^{1021110202021} is an apocalyptic number.

It is an amenable number.

1021110202021 is a deficient number, since it is larger than the sum of its proper divisors (243350963163).

1021110202021 is a wasteful number, since it uses less digits than its factorization.

1021110202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68840620.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021110202021 its reverse (1202020111201), we get a palindrome (2223130313222).

The spelling of 1021110202021 in words is "one trillion, twenty-one billion, one hundred ten million, two hundred two thousand, twenty-one".