21323400121124 has 6 divisors (see below), whose sum is σ = 37315950211974. Its totient is φ = 10661700060560.

The previous prime is 21323400121031. The next prime is 21323400121147. The reversal of 21323400121124 is 42112100432312.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14728570679524 + 6594829441600 = 3837782^2 + 2568040^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21323400121093 and 21323400121102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2665425015137 + ... + 2665425015144.

It is an arithmetic number, because the mean of its divisors is an integer number (6219325035329).

Almost surely, 2^{21323400121124} is an apocalyptic number.

It is an amenable number.

21323400121124 is a deficient number, since it is larger than the sum of its proper divisors (15992550090850).

21323400121124 is a wasteful number, since it uses less digits than its factorization.

21323400121124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5330850030285 (or 5330850030283 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21323400121124 its reverse (42112100432312), we get a palindrome (63435500553436).

The spelling of 21323400121124 in words is "twenty-one trillion, three hundred twenty-three billion, four hundred million, one hundred twenty-one thousand, one hundred twenty-four".