20011222102 has 4 divisors (see below), whose sum is σ = 30016833156. Its totient is φ = 10005611050.

The previous prime is 20011222073. The next prime is 20011222103. The reversal of 20011222102 is 20122211002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20122211002 = 2 ⋅10061105501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011222103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5002805524 + ... + 5002805527.

It is an arithmetic number, because the mean of its divisors is an integer number (7504208289).

Almost surely, 2^20011222102 is an apocalyptic number.

20011222102 is a deficient number, since it is larger than the sum of its proper divisors (10005611054).

20011222102 is a wasteful number, since it uses less digits than its factorization.

20011222102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10005611053.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20011222102 its reverse (20122211002), we get a palindrome (40133433104).

The spelling of 20011222102 in words is "twenty billion, eleven million, two hundred twenty-two thousand, one hundred two".