21121101021004 has 12 divisors (see below), whose sum is σ = 36962038371328. Its totient is φ = 10560518629200.

The previous prime is 21121101020983. The next prime is 21121101021043. The reversal of 21121101021004 is 40012010112112.

It is a super-2 number, since 2×21121101021004² (a number of 27 digits) contains 22 as substring.

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, 6447387 + ... + 9154834.

Almost surely, 2^{21121101021004} is an apocalyptic number.

It is an amenable number.

21121101021004 is a deficient number, since it is larger than the sum of its proper divisors (15840937350324).

21121101021004 is a wasteful number, since it uses less digits than its factorization.

21121101021004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15940656 (or 15940654 counting only the distinct ones).

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

Adding to 21121101021004 its reverse (40012010112112), we get a palindrome (61133111133116).

The spelling of 21121101021004 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred one million, twenty-one thousand, four".