20021121220222 has 16 divisors (see below), whose sum is σ = 31337507453472. Its totient is φ = 9575288189280.

The previous prime is 20021121220213. The next prime is 20021121220249. The reversal of 20021121220222 is 22202212112002.

It is a self number, because there is not a number n which added to its sum of digits gives 20021121220222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21285748 + ... + 22206424.

It is an arithmetic number, because the mean of its divisors is an integer number (1958594215842).

Almost surely, 2^{20021121220222} is an apocalyptic number.

20021121220222 is a deficient number, since it is larger than the sum of its proper divisors (11316386233250).

20021121220222 is a wasteful number, since it uses less digits than its factorization.

20021121220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393443.

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

Adding to 20021121220222 its reverse (22202212112002), we get a palindrome (42223333332224).

The spelling of 20021121220222 in words is "twenty trillion, twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twenty-two".