21111030992 has 20 divisors (see below), whose sum is σ = 40924449120. Its totient is φ = 10549882848.

The previous prime is 21111030959. The next prime is 21111031003. The reversal of 21111030992 is 29903011112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321038 + ... + 381165.

It is an arithmetic number, because the mean of its divisors is an integer number (2046222456).

Almost surely, 2^21111030992 is an apocalyptic number.

It is an amenable number.

21111030992 is a deficient number, since it is larger than the sum of its proper divisors (19813418128).

21111030992 is a wasteful number, since it uses less digits than its factorization.

21111030992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704090 (or 704084 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 29.

The spelling of 21111030992 in words is "twenty-one billion, one hundred eleven million, thirty thousand, nine hundred ninety-two".