21011010404 has 12 divisors (see below), whose sum is σ = 37287145728. Its totient is φ = 10357540200.

The previous prime is 21011010389. The next prime is 21011010421. The reversal of 21011010404 is 40401011012.

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, 36990932 + ... + 36991499.

It is an arithmetic number, because the mean of its divisors is an integer number (3107262144).

Almost surely, 2^21011010404 is an apocalyptic number.

It is an amenable number.

21011010404 is a deficient number, since it is larger than the sum of its proper divisors (16276135324).

21011010404 is a wasteful number, since it uses less digits than its factorization.

21011010404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73982506 (or 73982504 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21011010404 its reverse (40401011012), we get a palindrome (61412021416).

The spelling of 21011010404 in words is "twenty-one billion, eleven million, ten thousand, four hundred four".