20012221020122 has 8 divisors (see below), whose sum is σ = 30019946951136. Its totient is φ = 10005572036412.

The previous prime is 20012221019957. The next prime is 20012221020131. The reversal of 20012221020122 is 22102012221002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20012221020122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269190368 + ... + 269264699.

It is an arithmetic number, because the mean of its divisors is an integer number (3752493368892).

Almost surely, 2^{20012221020122} is an apocalyptic number.

20012221020122 is a deficient number, since it is larger than the sum of its proper divisors (10007725931014).

20012221020122 is a wasteful number, since it uses less digits than its factorization.

20012221020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538473652.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20012221020122 its reverse (22102012221002), we get a palindrome (42114233241124).

The spelling of 20012221020122 in words is "twenty trillion, twelve billion, two hundred twenty-one million, twenty thousand, one hundred twenty-two".