21652614506121 has 4 divisors (see below), whose sum is σ = 28870152674832. Its totient is φ = 14435076337412.

The previous prime is 21652614506119. The next prime is 21652614506293. The reversal of 21652614506121 is 12160541625612.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21652614506121 - 2¹ = 21652614506119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21652614506821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3608769084351 + ... + 3608769084356.

It is an arithmetic number, because the mean of its divisors is an integer number (7217538168708).

Almost surely, 2^{21652614506121} is an apocalyptic number.

It is an amenable number.

21652614506121 is a deficient number, since it is larger than the sum of its proper divisors (7217538168711).

21652614506121 is an equidigital number, since it uses as much as digits as its factorization.

21652614506121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7217538168710.

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 21652614506121 in words is "twenty-one trillion, six hundred fifty-two billion, six hundred fourteen million, five hundred six thousand, one hundred twenty-one".