21123221011301 has 64 divisors (see below), whose sum is σ = 23632736256000. Its totient is φ = 18798770511360.

The previous prime is 21123221011297. The next prime is 21123221011309. The reversal of 21123221011301 is 10311012232112.

It is a cyclic number.

It is not a de Polignac number, because 21123221011301 - 2² = 21123221011297 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123221011309) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6481502210 + ... + 6481505468.

It is an arithmetic number, because the mean of its divisors is an integer number (369261504000).

Almost surely, 2^{21123221011301} is an apocalyptic number.

It is an amenable number.

21123221011301 is a deficient number, since it is larger than the sum of its proper divisors (2509515244699).

21123221011301 is a wasteful number, since it uses less digits than its factorization.

21123221011301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5202.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21123221011301 its reverse (10311012232112), we get a palindrome (31434233243413).

The spelling of 21123221011301 in words is "twenty-one trillion, one hundred twenty-three billion, two hundred twenty-one million, eleven thousand, three hundred one".