21110012212001 has 32 divisors (see below), whose sum is σ = 22100916096000. Its totient is φ = 20140296480000.

The previous prime is 21110012211979. The next prime is 21110012212039. The reversal of 21110012212001 is 10021221001112.

It is a cyclic number.

It is not a de Polignac number, because 21110012212001 - 2¹⁰ = 21110012210977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110012242001) 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, 1767853691 + ... + 1767865631.

It is an arithmetic number, because the mean of its divisors is an integer number (690653628000).

Almost surely, 2^{21110012212001} is an apocalyptic number.

It is an amenable number.

21110012212001 is a deficient number, since it is larger than the sum of its proper divisors (990903883999).

21110012212001 is a wasteful number, since it uses less digits than its factorization.

21110012212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14441.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21110012212001 its reverse (10021221001112), we get a palindrome (31131233213113).

The spelling of 21110012212001 in words is "twenty-one trillion, one hundred ten billion, twelve million, two hundred twelve thousand, one".