221002110202020 has 288 divisors, whose sum is σ = 739749376574208. Its totient is φ = 49118994183168.

The previous prime is 221002110201973. The next prime is 221002110202099. The reversal of 221002110202020 is 20202011200122.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 174832369 + ... + 176091911.

It is an arithmetic number, because the mean of its divisors is an integer number (2568574224216).

Almost surely, 2^{221002110202020} is an apocalyptic number.

221002110202020 is a gapful number since it is divisible by the number (20) 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 221002110202020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369874688287104).

221002110202020 is an abundant number, since it is smaller than the sum of its proper divisors (518747266372188).

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

221002110202020 is a wasteful number, since it uses less digits than its factorization.

221002110202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261219 (or 1261210 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221002110202020 its reverse (20202011200122), we get a palindrome (241204121402142).

The spelling of 221002110202020 in words is "two hundred twenty-one trillion, two billion, one hundred ten million, two hundred two thousand, twenty".