20210122220102 has 4 divisors (see below), whose sum is σ = 30315183330156. Its totient is φ = 10105061110050.

The previous prime is 20210122220083. The next prime is 20210122220107. The reversal of 20210122220102 is 20102222101202.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210122220107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5052530555024 + ... + 5052530555027.

It is an arithmetic number, because the mean of its divisors is an integer number (7578795832539).

Almost surely, 2^{20210122220102} is an apocalyptic number.

20210122220102 is a deficient number, since it is larger than the sum of its proper divisors (10105061110054).

20210122220102 is a wasteful number, since it uses less digits than its factorization.

20210122220102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10105061110053.

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

Adding to 20210122220102 its reverse (20102222101202), we get a palindrome (40312344321304).

The spelling of 20210122220102 in words is "twenty trillion, two hundred ten billion, one hundred twenty-two million, two hundred twenty thousand, one hundred two".