21100121134235 has 32 divisors (see below), whose sum is σ = 30472274589120. Its totient is φ = 13819625625600.

The previous prime is 21100121134177. The next prime is 21100121134243. The reversal of 21100121134235 is 53243112100112.

It is not a de Polignac number, because 21100121134235 - 2⁶ = 21100121134171 is a prime.

It is a super-2 number, since 2×21100121134235² (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 31 ways as a sum of consecutive naturals, for example, 359856770 + ... + 359915399.

It is an arithmetic number, because the mean of its divisors is an integer number (952258580910).

Almost surely, 2^{21100121134235} is an apocalyptic number.

21100121134235 is a deficient number, since it is larger than the sum of its proper divisors (9372153454885).

21100121134235 is a wasteful number, since it uses less digits than its factorization.

21100121134235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719772239.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 21100121134235 its reverse (53243112100112), we get a palindrome (74343233234347).

The spelling of 21100121134235 in words is "twenty-one trillion, one hundred billion, one hundred twenty-one million, one hundred thirty-four thousand, two hundred thirty-five".