21023033220210 has 384 divisors, whose sum is σ = 60936701946624. Its totient is φ = 4624891944960.

The previous prime is 21023033220199. The next prime is 21023033220253. The reversal of 21023033220210 is 1202233032012.

It is a happy number.

It is a super-3 number, since 3×21023033220210³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3986918134 + ... + 3986923406.

It is an arithmetic number, because the mean of its divisors is an integer number (158689327986).

Almost surely, 2^{21023033220210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21023033220210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30468350973312).

21023033220210 is an abundant number, since it is smaller than the sum of its proper divisors (39913668726414).

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

21023033220210 is a wasteful number, since it uses less digits than its factorization.

21023033220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6218 (or 6211 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21023033220210 its reverse (1202233032012), we get a palindrome (22225266252222).

The spelling of 21023033220210 in words is "twenty-one trillion, twenty-three billion, thirty-three million, two hundred twenty thousand, two hundred ten".