21731133201 has 8 divisors (see below), whose sum is σ = 30679246944. Its totient is φ = 13635220800.

The previous prime is 21731133191. The next prime is 21731133211. The reversal of 21731133201 is 10233113712.

It is an interprime number because it is at equal distance from previous prime (21731133191) and next prime (21731133211).

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

It is not a de Polignac number, because 21731133201 - 2¹⁴ = 21731116817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21731133211) 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, 213050275 + ... + 213050376.

It is an arithmetic number, because the mean of its divisors is an integer number (3834905868).

Almost surely, 2^21731133201 is an apocalyptic number.

It is an amenable number.

21731133201 is a deficient number, since it is larger than the sum of its proper divisors (8948113743).

21731133201 is a wasteful number, since it uses less digits than its factorization.

21731133201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426100671.

The product of its (nonzero) digits is 756, while the sum is 24.

Adding to 21731133201 its reverse (10233113712), we get a palindrome (31964246913).

The spelling of 21731133201 in words is "twenty-one billion, seven hundred thirty-one million, one hundred thirty-three thousand, two hundred one".