21012401031134 has 4 divisors (see below), whose sum is σ = 31518601546704. Its totient is φ = 10506200515566.

The previous prime is 21012401031133. The next prime is 21012401031161. The reversal of 21012401031134 is 43113010421012.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012401031133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5253100257782 + ... + 5253100257785.

It is an arithmetic number, because the mean of its divisors is an integer number (7879650386676).

Almost surely, 2^{21012401031134} is an apocalyptic number.

21012401031134 is a deficient number, since it is larger than the sum of its proper divisors (10506200515570).

21012401031134 is a wasteful number, since it uses less digits than its factorization.

21012401031134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10506200515569.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21012401031134 its reverse (43113010421012), we get a palindrome (64125411452146).

The spelling of 21012401031134 in words is "twenty-one trillion, twelve billion, four hundred one million, thirty-one thousand, one hundred thirty-four".