21112021034 has 32 divisors (see below), whose sum is σ = 35932425984. Its totient is φ = 9229841280.

The previous prime is 21112021033. The next prime is 21112021061. The reversal of 21112021034 is 43012021112.

It is not an unprimeable number, because it can be changed into a prime (21112021033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109787 + ... + 232974.

It is an arithmetic number, because the mean of its divisors is an integer number (1122888312).

Almost surely, 2^21112021034 is an apocalyptic number.

21112021034 is a deficient number, since it is larger than the sum of its proper divisors (14820404950).

21112021034 is a wasteful number, since it uses less digits than its factorization.

21112021034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342902.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21112021034 its reverse (43012021112), we get a palindrome (64124042146).

The spelling of 21112021034 in words is "twenty-one billion, one hundred twelve million, twenty-one thousand, thirty-four".