10010021221020 has 96 divisors (see below), whose sum is σ = 28417343109120. Its totient is φ = 2632346496000.

The previous prime is 10010021221003. The next prime is 10010021221049. The reversal of 10010021221020 is 2012212001001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 10010021220987 and 10010021221005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2618020 + ... + 5184020.

It is an arithmetic number, because the mean of its divisors is an integer number (296013990720).

Almost surely, 2^{10010021221020} is an apocalyptic number.

10010021221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10010021221020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14208671554560).

10010021221020 is an abundant number, since it is smaller than the sum of its proper divisors (18407321888100).

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

10010021221020 is a wasteful number, since it uses less digits than its factorization.

10010021221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566915 (or 2566913 counting only the distinct ones).

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

Adding to 10010021221020 its reverse (2012212001001), we get a palindrome (12022233222021).

The spelling of 10010021221020 in words is "ten trillion, ten billion, twenty-one million, two hundred twenty-one thousand, twenty".