21121022004115 has 32 divisors (see below), whose sum is σ = 27663006790656. Its totient is φ = 15353151644160.

The previous prime is 21121022004107. The next prime is 21121022004157. The reversal of 21121022004115 is 51140022012112.

It is not a de Polignac number, because 21121022004115 - 2³ = 21121022004107 is a prime.

It is a super-2 number, since 2×21121022004115² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1159021894 + ... + 1159040116.

It is an arithmetic number, because the mean of its divisors is an integer number (864468962208).

Almost surely, 2^{21121022004115} is an apocalyptic number.

21121022004115 is a deficient number, since it is larger than the sum of its proper divisors (6541984786541).

21121022004115 is a wasteful number, since it uses less digits than its factorization.

21121022004115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27499.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 21121022004115 its reverse (51140022012112), we get a palindrome (72261044016227).

The spelling of 21121022004115 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-two million, four thousand, one hundred fifteen".