21101030012 has 6 divisors (see below), whose sum is σ = 36926802528. Its totient is φ = 10550515004.

The previous prime is 21101030011. The next prime is 21101030021. The reversal of 21101030012 is 21003010112.

It is a junction number, because it is equal to n+sod(n) for n = 21101029975 and 21101030002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101030011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2637628748 + ... + 2637628755.

It is an arithmetic number, because the mean of its divisors is an integer number (6154467088).

Almost surely, 2^21101030012 is an apocalyptic number.

It is an amenable number.

21101030012 is a deficient number, since it is larger than the sum of its proper divisors (15825772516).

21101030012 is a wasteful number, since it uses less digits than its factorization.

21101030012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5275257507 (or 5275257505 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21101030012 its reverse (21003010112), we get a palindrome (42104040124).

The spelling of 21101030012 in words is "twenty-one billion, one hundred one million, thirty thousand, twelve".