21320122012102 has 4 divisors (see below), whose sum is σ = 31980183018156. Its totient is φ = 10660061006050.

The previous prime is 21320122012073. The next prime is 21320122012109. The reversal of 21320122012102 is 20121022102312.

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

It is a super-2 number, since 2×21320122012102² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21320122012102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320122012109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5330030503024 + ... + 5330030503027.

It is an arithmetic number, because the mean of its divisors is an integer number (7995045754539).

Almost surely, 2^{21320122012102} is an apocalyptic number.

21320122012102 is a deficient number, since it is larger than the sum of its proper divisors (10660061006054).

21320122012102 is a wasteful number, since it uses less digits than its factorization.

21320122012102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10660061006053.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21320122012102 its reverse (20121022102312), we get a palindrome (41441144114414).

The spelling of 21320122012102 in words is "twenty-one trillion, three hundred twenty billion, one hundred twenty-two million, twelve thousand, one hundred two".