21032213121020 has 48 divisors (see below), whose sum is σ = 47333601177408. Its totient is φ = 7829618227200.

The previous prime is 21032213120993. The next prime is 21032213121083. The reversal of 21032213121020 is 2012131223012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21032213120983 and 21032213121001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 617850581 + ... + 617884620.

It is an arithmetic number, because the mean of its divisors is an integer number (986116691196).

Almost surely, 2^{21032213121020} is an apocalyptic number.

21032213121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21032213121020 is an abundant number, since it is smaller than the sum of its proper divisors (26301388056388).

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

21032213121020 is a wasteful number, since it uses less digits than its factorization.

21032213121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235735270 (or 1235735268 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21032213121020 its reverse (2012131223012), we get a palindrome (23044344344032).

The spelling of 21032213121020 in words is "twenty-one trillion, thirty-two billion, two hundred thirteen million, one hundred twenty-one thousand, twenty".