221020221221002 has 16 divisors (see below), whose sum is σ = 398833481903040. Its totient is φ = 89737533427968.

The previous prime is 221020221220949. The next prime is 221020221221003. The reversal of 221020221221002 is 200122122020122.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (221020221221003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415451543383 + ... + 415451543914.

It is an arithmetic number, because the mean of its divisors is an integer number (24927092618940).

Almost surely, 2^{221020221221002} is an apocalyptic number.

221020221221002 is a deficient number, since it is larger than the sum of its proper divisors (177813260682038).

221020221221002 is a wasteful number, since it uses less digits than its factorization.

221020221221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830903087325.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221020221221002 its reverse (200122122020122), we get a palindrome (421142343241124).

The spelling of 221020221221002 in words is "two hundred twenty-one trillion, twenty billion, two hundred twenty-one million, two hundred twenty-one thousand, two".