21140122012201 has 8 divisors (see below), whose sum is σ = 22383731037960. Its totient is φ = 19896521035008.

The previous prime is 21140122012187. The next prime is 21140122012237. The reversal of 21140122012201 is 10221022104112.

It can be written as a sum of positive squares in 4 ways, for example, as 16530534482176 + 4609587530025 = 4065776^2 + 2146995^2 .

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 21140122012201 - 2⁵ = 21140122012169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21140122012241) 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, 3890215 + ... + 7577203.

It is an arithmetic number, because the mean of its divisors is an integer number (2797966379745).

Almost surely, 2^{21140122012201} is an apocalyptic number.

It is an amenable number.

21140122012201 is a deficient number, since it is larger than the sum of its proper divisors (1243609025759).

21140122012201 is a wasteful number, since it uses less digits than its factorization.

21140122012201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4024283.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21140122012201 its reverse (10221022104112), we get a palindrome (31361144116313).

The spelling of 21140122012201 in words is "twenty-one trillion, one hundred forty billion, one hundred twenty-two million, twelve thousand, two hundred one".