20122221022 has 4 divisors (see below), whose sum is σ = 30183331536. Its totient is φ = 10061110510.

The previous prime is 20122221017. The next prime is 20122221029. The reversal of 20122221022 is 22012222102.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 20122220987 and 20122221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122221029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030555254 + ... + 5030555257.

It is an arithmetic number, because the mean of its divisors is an integer number (7545832884).

Almost surely, 2^20122221022 is an apocalyptic number.

20122221022 is a deficient number, since it is larger than the sum of its proper divisors (10061110514).

20122221022 is a wasteful number, since it uses less digits than its factorization.

20122221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10061110513.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20122221022 its reverse (22012222102), we get a palindrome (42134443124).

It can be divided in two parts, 2012222102 and 2, that multiplied together give a palindrome (4024444204).

The spelling of 20122221022 in words is "twenty billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-two".