21123451335022 has 8 divisors (see below), whose sum is σ = 31808465629776. Its totient is φ = 10520629458432.

The previous prime is 21123451335013. The next prime is 21123451335059. The reversal of 21123451335022 is 22053315432112.

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

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 20548103898 + ... + 20548104925.

It is an arithmetic number, because the mean of its divisors is an integer number (3976058203722).

Almost surely, 2^{21123451335022} is an apocalyptic number.

21123451335022 is a deficient number, since it is larger than the sum of its proper divisors (10685014294754).

21123451335022 is a wasteful number, since it uses less digits than its factorization.

21123451335022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41096209082.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 21123451335022 its reverse (22053315432112), we get a palindrome (43176766767134).

The spelling of 21123451335022 in words is "twenty-one trillion, one hundred twenty-three billion, four hundred fifty-one million, three hundred thirty-five thousand, twenty-two".