2101020201021 has 128 divisors (see below), whose sum is σ = 3393355714560. Its totient is φ = 1131082444800.

The previous prime is 2101020201019. The next prime is 2101020201089. The reversal of 2101020201021 is 1201020201012.

It is not a de Polignac number, because 2101020201021 - 2¹ = 2101020201019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101020200988 and 2101020201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101020201121) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2384812501 + ... + 2384813381.

It is an arithmetic number, because the mean of its divisors is an integer number (26510591520).

Almost surely, 2^{2101020201021} is an apocalyptic number.

2101020201021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2101020201021 is a deficient number, since it is larger than the sum of its proper divisors (1292335513539).

2101020201021 is a wasteful number, since it uses less digits than its factorization.

2101020201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2101020201021 its reverse (1201020201012), we get a palindrome (3302040402033).

Subtracting from 2101020201021 its reverse (1201020201012), we obtain a palindrome (900000000009).

The spelling of 2101020201021 in words is "two trillion, one hundred one billion, twenty million, two hundred one thousand, twenty-one".