21112031302 has 4 divisors (see below), whose sum is σ = 31668046956. Its totient is φ = 10556015650.

The previous prime is 21112031287. The next prime is 21112031323. The reversal of 21112031302 is 20313021112.

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, 5278007824 + ... + 5278007827.

It is an arithmetic number, because the mean of its divisors is an integer number (7917011739).

Almost surely, 2^21112031302 is an apocalyptic number.

21112031302 is a deficient number, since it is larger than the sum of its proper divisors (10556015654).

21112031302 is a wasteful number, since it uses less digits than its factorization.

21112031302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10556015653.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21112031302 its reverse (20313021112), we get a palindrome (41425052414).

The spelling of 21112031302 in words is "twenty-one billion, one hundred twelve million, thirty-one thousand, three hundred two".