21121434103121 has 8 divisors (see below), whose sum is σ = 23256906201504. Its totient is φ = 19021852292320.

The previous prime is 21121434103117. The next prime is 21121434103157. The reversal of 21121434103121 is 12130143412112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21121434103121 - 2² = 21121434103117 is a prime.

It is a super-2 number, since 2×21121434103121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21121434103181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8972570660 + ... + 8972573013.

It is an arithmetic number, because the mean of its divisors is an integer number (2907113275188).

Almost surely, 2^{21121434103121} is an apocalyptic number.

It is an amenable number.

21121434103121 is a deficient number, since it is larger than the sum of its proper divisors (2135472098383).

21121434103121 is a wasteful number, since it uses less digits than its factorization.

21121434103121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17945143791.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 21121434103121 its reverse (12130143412112), we get a palindrome (33251577515233).

The spelling of 21121434103121 in words is "twenty-one trillion, one hundred twenty-one billion, four hundred thirty-four million, one hundred three thousand, one hundred twenty-one".