21021130001020 has 48 divisors (see below), whose sum is σ = 44370035696448. Its totient is φ = 8365471672320.

The previous prime is 21021130001017. The next prime is 21021130001023. The reversal of 21021130001020 is 2010003112012.

It is an interprime number because it is at equal distance from previous prime (21021130001017) and next prime (21021130001023).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021130001023) 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, 134957785 + ... + 135113455.

It is an arithmetic number, because the mean of its divisors is an integer number (924375743676).

Almost surely, 2^{21021130001020} is an apocalyptic number.

21021130001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21021130001020 is an abundant number, since it is smaller than the sum of its proper divisors (23348905695428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21021130001020 is a wasteful number, since it uses less digits than its factorization.

21021130001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190150 (or 190148 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21021130001020 its reverse (2010003112012), we get a palindrome (23031133113032).

The spelling of 21021130001020 in words is "twenty-one trillion, twenty-one billion, one hundred thirty million, one thousand, twenty".