21034144231121 has 32 divisors (see below), whose sum is σ = 24557774400000. Its totient is φ = 17644116994560.

The previous prime is 21034144231069. The next prime is 21034144231123. The reversal of 21034144231121 is 12113244143012.

It is not a de Polignac number, because 21034144231121 - 2³⁴ = 21016964361937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21034144231123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110466005 + ... + 110656253.

It is an arithmetic number, because the mean of its divisors is an integer number (767430450000).

Almost surely, 2^{21034144231121} is an apocalyptic number.

It is an amenable number.

21034144231121 is a deficient number, since it is larger than the sum of its proper divisors (3523630168879).

21034144231121 is a wasteful number, since it uses less digits than its factorization.

21034144231121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191969.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 21034144231121 its reverse (12113244143012), we get a palindrome (33147388374133).

The spelling of 21034144231121 in words is "twenty-one trillion, thirty-four billion, one hundred forty-four million, two hundred thirty-one thousand, one hundred twenty-one".