1020200202021 has 128 divisors (see below), whose sum is σ = 1877575053312. Its totient is φ = 475517952000.

The previous prime is 1020200202001. The next prime is 1020200202031. The reversal of 1020200202021 is 1202020020201.

It is not a de Polignac number, because 1020200202021 - 2⁷ = 1020200201893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020200201988 and 1020200202006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020200202001) 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, 130107061 + ... + 130114901.

It is an arithmetic number, because the mean of its divisors is an integer number (14668555104).

Almost surely, 2^{1020200202021} is an apocalyptic number.

1020200202021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1020200202021 is a deficient number, since it is larger than the sum of its proper divisors (857374851291).

1020200202021 is a wasteful number, since it uses less digits than its factorization.

1020200202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9083.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1020200202021 its reverse (1202020020201), we get a palindrome (2222220222222).

It can be divided in two parts, 1020200 and 202021, that added together give a palindrome (1222221).

The spelling of 1020200202021 in words is "one trillion, twenty billion, two hundred million, two hundred two thousand, twenty-one".