21020230202010 has 256 divisors, whose sum is σ = 58387360066560. Its totient is φ = 4796967813120.

The previous prime is 21020230201987. The next prime is 21020230202021. The reversal of 21020230202010 is 1020203202012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 542732326 + ... + 542771054.

It is an arithmetic number, because the mean of its divisors is an integer number (228075625260).

Almost surely, 2^{21020230202010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21020230202010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29193680033280).

21020230202010 is an abundant number, since it is smaller than the sum of its proper divisors (37367129864550).

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

21020230202010 is a wasteful number, since it uses less digits than its factorization.

21020230202010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39993.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21020230202010 its reverse (1020203202012), we get a palindrome (22040433404022).

The spelling of 21020230202010 in words is "twenty-one trillion, twenty billion, two hundred thirty million, two hundred two thousand, ten".