21100121134234 has 8 divisors (see below), whose sum is σ = 31712362806420. Its totient is φ = 10529333532096.

The previous prime is 21100121134177. The next prime is 21100121134243. The reversal of 21100121134234 is 43243112100112.

It can be written as a sum of positive squares in 2 ways, for example, as 16834223320209 + 4265897814025 = 4102953^2 + 2065405^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21100121134234² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21100121134199 and 21100121134208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10363516239 + ... + 10363518274.

Almost surely, 2^{21100121134234} is an apocalyptic number.

21100121134234 is a deficient number, since it is larger than the sum of its proper divisors (10612241672186).

21100121134234 is a wasteful number, since it uses less digits than its factorization.

21100121134234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20727035024.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 21100121134234 its reverse (43243112100112), we get a palindrome (64343233234346).

The spelling of 21100121134234 in words is "twenty-one trillion, one hundred billion, one hundred twenty-one million, one hundred thirty-four thousand, two hundred thirty-four".