21022303102 has 4 divisors (see below), whose sum is σ = 31533454656. Its totient is φ = 10511151550.

The previous prime is 21022303091. The next prime is 21022303103. The reversal of 21022303102 is 20130322012.

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 (21022303103) 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, 5255575774 + ... + 5255575777.

It is an arithmetic number, because the mean of its divisors is an integer number (7883363664).

Almost surely, 2^21022303102 is an apocalyptic number.

21022303102 is a deficient number, since it is larger than the sum of its proper divisors (10511151554).

21022303102 is a wasteful number, since it uses less digits than its factorization.

21022303102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511151553.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21022303102 its reverse (20130322012), we get a palindrome (41152625114).

The spelling of 21022303102 in words is "twenty-one billion, twenty-two million, three hundred three thousand, one hundred two".