20021102122102 has 4 divisors (see below), whose sum is σ = 30031653183156. Its totient is φ = 10010551061050.

The previous prime is 20021102122097. The next prime is 20021102122141. The reversal of 20021102122102 is 20122120112002.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005275530524 + ... + 5005275530527.

It is an arithmetic number, because the mean of its divisors is an integer number (7507913295789).

Almost surely, 2^{20021102122102} is an apocalyptic number.

20021102122102 is a deficient number, since it is larger than the sum of its proper divisors (10010551061054).

20021102122102 is a wasteful number, since it uses less digits than its factorization.

20021102122102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010551061053.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20021102122102 its reverse (20122120112002), we get a palindrome (40143222234104).

The spelling of 20021102122102 in words is "twenty trillion, twenty-one billion, one hundred two million, one hundred twenty-two thousand, one hundred two".