21120434224043 has 8 divisors (see below), whose sum is σ = 26331969941760. Its totient is φ = 16457481213480.

The previous prime is 21120434224037. The next prime is 21120434224121. The reversal of 21120434224043 is 34042243402112.

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 21120434224043 - 2¹² = 21120434219947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21120434224943) 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, 137145676703 + ... + 137145676856.

It is an arithmetic number, because the mean of its divisors is an integer number (3291496242720).

Almost surely, 2^{21120434224043} is an apocalyptic number.

21120434224043 is a deficient number, since it is larger than the sum of its proper divisors (5211535717717).

21120434224043 is a wasteful number, since it uses less digits than its factorization.

21120434224043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274291353577.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 21120434224043 its reverse (34042243402112), we get a palindrome (55162677626155).

The spelling of 21120434224043 in words is "twenty-one trillion, one hundred twenty billion, four hundred thirty-four million, two hundred twenty-four thousand, forty-three".