21002121110095 has 64 divisors (see below), whose sum is σ = 27016809431040. Its totient is φ = 15646050201600.

The previous prime is 21002121110077. The next prime is 21002121110099. The reversal of 21002121110095 is 59001112120012.

It is not a de Polignac number, because 21002121110095 - 2⁷ = 21002121109967 is a prime.

It is a super-2 number, since 2×21002121110095² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002121110099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 240582855 + ... + 240670135.

It is an arithmetic number, because the mean of its divisors is an integer number (422137647360).

Almost surely, 2^{21002121110095} is an apocalyptic number.

21002121110095 is a deficient number, since it is larger than the sum of its proper divisors (6014688320945).

21002121110095 is a wasteful number, since it uses less digits than its factorization.

21002121110095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87896.

The product of its (nonzero) digits is 360, while the sum is 25.

The spelling of 21002121110095 in words is "twenty-one trillion, two billion, one hundred twenty-one million, one hundred ten thousand, ninety-five".