21224521624042 has 16 divisors (see below), whose sum is σ = 34905563208000. Its totient is φ = 9599029878240.

The previous prime is 21224521623997. The next prime is 21224521624057. The reversal of 21224521624042 is 24042612542212.

It is a junction number, because it is equal to n+sod(n) for n = 21224521623992 and 21224521624010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2423993067 + ... + 2424001822.

It is an arithmetic number, because the mean of its divisors is an integer number (2181597700500).

Almost surely, 2^{21224521624042} is an apocalyptic number.

21224521624042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21224521624042 is a deficient number, since it is larger than the sum of its proper divisors (13681041583958).

21224521624042 is a wasteful number, since it uses less digits than its factorization.

21224521624042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4847995101.

The product of its (nonzero) digits is 122880, while the sum is 37.

The spelling of 21224521624042 in words is "twenty-one trillion, two hundred twenty-four billion, five hundred twenty-one million, six hundred twenty-four thousand, forty-two".