21120600641 has 16 divisors (see below), whose sum is σ = 26181066240. Its totient is φ = 16622891520.

The previous prime is 21120600593. The next prime is 21120600649. The reversal of 21120600641 is 14600602112.

It is a cyclic number.

It is not a de Polignac number, because 21120600641 - 2¹⁴ = 21120584257 is a prime.

It is a super-2 number, since 2×21120600641² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21120600649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2159561 + ... + 2169318.

It is an arithmetic number, because the mean of its divisors is an integer number (1636316640).

Almost surely, 2^21120600641 is an apocalyptic number.

It is an amenable number.

21120600641 is a deficient number, since it is larger than the sum of its proper divisors (5060465599).

21120600641 is a wasteful number, since it uses less digits than its factorization.

21120600641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328944.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 21120600641 in words is "twenty-one billion, one hundred twenty million, six hundred thousand, six hundred forty-one".