21111020122001 has 8 divisors (see below), whose sum is σ = 22034220661440. Its totient is φ = 20188263757552.

The previous prime is 21111020121943. The next prime is 21111020122051. The reversal of 21111020122001 is 10022102011112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21111020122001 - 2⁶ = 21111020121937 is a prime.

It is a super-2 number, since 2×21111020122001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21111020122051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110946611 + ... + 111136728.

It is an arithmetic number, because the mean of its divisors is an integer number (2754277582680).

Almost surely, 2^{21111020122001} is an apocalyptic number.

It is an amenable number.

21111020122001 is a deficient number, since it is larger than the sum of its proper divisors (923200539439).

21111020122001 is a wasteful number, since it uses less digits than its factorization.

21111020122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222087495.

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

Adding to 21111020122001 its reverse (10022102011112), we get a palindrome (31133122133113).

The spelling of 21111020122001 in words is "twenty-one trillion, one hundred eleven billion, twenty million, one hundred twenty-two thousand, one".