21120030213042 has 32 divisors (see below), whose sum is σ = 43697570230080. Its totient is φ = 6797102392640.

The previous prime is 21120030213031. The next prime is 21120030213091. The reversal of 21120030213042 is 24031203002112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6790492 + ... + 9399512.

It is an arithmetic number, because the mean of its divisors is an integer number (1365549069690).

Almost surely, 2^{21120030213042} is an apocalyptic number.

21120030213042 is an abundant number, since it is smaller than the sum of its proper divisors (22577540017038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21120030213042 is a wasteful number, since it uses less digits than its factorization.

21120030213042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655578.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21120030213042 its reverse (24031203002112), we get a palindrome (45151233215154).

The spelling of 21120030213042 in words is "twenty-one trillion, one hundred twenty billion, thirty million, two hundred thirteen thousand, forty-two".