21111221120019 has 32 divisors (see below), whose sum is σ = 28321000081920. Its totient is φ = 13988022419712.

The previous prime is 21111221119951. The next prime is 21111221120131. The reversal of 21111221120019 is 91002112211112.

It is not a de Polignac number, because 21111221120019 - 2²⁹ = 21110684249107 is a prime.

It is a super-2 number, since 2×21111221120019² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21111221120419) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1945191397 + ... + 1945202249.

It is an arithmetic number, because the mean of its divisors is an integer number (885031252560).

Almost surely, 2^{21111221120019} is an apocalyptic number.

21111221120019 is a deficient number, since it is larger than the sum of its proper divisors (7209778961901).

21111221120019 is a wasteful number, since it uses less digits than its factorization.

21111221120019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15739.

The product of its (nonzero) digits is 144, while the sum is 24.

The spelling of 21111221120019 in words is "twenty-one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty thousand, nineteen".