21131121301102 has 4 divisors (see below), whose sum is σ = 31696681951656. Its totient is φ = 10565560650550.

The previous prime is 21131121301097. The next prime is 21131121301123. The reversal of 21131121301102 is 20110312113112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21131121301102.

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, 5282780325274 + ... + 5282780325277.

It is an arithmetic number, because the mean of its divisors is an integer number (7924170487914).

Almost surely, 2^{21131121301102} is an apocalyptic number.

21131121301102 is a deficient number, since it is larger than the sum of its proper divisors (10565560650554).

21131121301102 is a wasteful number, since it uses less digits than its factorization.

21131121301102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10565560650553.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 21131121301102 its reverse (20110312113112), we get a palindrome (41241433414214).

The spelling of 21131121301102 in words is "twenty-one trillion, one hundred thirty-one billion, one hundred twenty-one million, three hundred one thousand, one hundred two".