21221110011004 has 6 divisors (see below), whose sum is σ = 37136942519264. Its totient is φ = 10610555005500.

The previous prime is 21221110010999. The next prime is 21221110011019. The reversal of 21221110011004 is 40011001112212.

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, 2652638751372 + ... + 2652638751379.

Almost surely, 2^{21221110011004} is an apocalyptic number.

It is an amenable number.

21221110011004 is a deficient number, since it is larger than the sum of its proper divisors (15915832508260).

21221110011004 is a wasteful number, since it uses less digits than its factorization.

21221110011004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305277502755 (or 5305277502753 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21221110011004 its reverse (40011001112212), we get a palindrome (61232111123216).

The spelling of 21221110011004 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred ten million, eleven thousand, four".