21000101104 has 10 divisors (see below), whose sum is σ = 40687695920. Its totient is φ = 10500050544.

The previous prime is 21000101069. The next prime is 21000101107. The reversal of 21000101104 is 40110100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000101107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656253144 + ... + 656253175.

It is an arithmetic number, because the mean of its divisors is an integer number (4068769592).

Almost surely, 2^21000101104 is an apocalyptic number.

It is an amenable number.

21000101104 is a deficient number, since it is larger than the sum of its proper divisors (19687594816).

21000101104 is a wasteful number, since it uses less digits than its factorization.

21000101104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312506327 (or 1312506321 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21000101104 its reverse (40110100012), we get a palindrome (61110201116).

The spelling of 21000101104 in words is "twenty-one billion, one hundred one thousand, one hundred four".