21311241201 has 6 divisors (see below), whose sum is σ = 30782903970. Its totient is φ = 14207494128.

The previous prime is 21311241181. The next prime is 21311241221. The reversal of 21311241201 is 10214211312.

21311241201 is a `hidden beast` number, since 213 + 11 + 241 + 201 = 666.

It is an interprime number because it is at equal distance from previous prime (21311241181) and next prime (21311241221).

It can be written as a sum of positive squares in only one way, i.e., 16348179600 + 4963061601 = 127860^2 + 70449^2 .

It is not a de Polignac number, because 21311241201 - 2¹¹ = 21311239153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21311241221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1183957836 + ... + 1183957853.

It is an arithmetic number, because the mean of its divisors is an integer number (5130483995).

Almost surely, 2^21311241201 is an apocalyptic number.

It is an amenable number.

21311241201 is a deficient number, since it is larger than the sum of its proper divisors (9471662769).

21311241201 is a wasteful number, since it uses less digits than its factorization.

21311241201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2367915695 (or 2367915692 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21311241201 its reverse (10214211312), we get a palindrome (31525452513).

The spelling of 21311241201 in words is "twenty-one billion, three hundred eleven million, two hundred forty-one thousand, two hundred one".