21131022201 has 32 divisors (see below), whose sum is σ = 29005827840. Its totient is φ = 13679366400.

The previous prime is 21131022193. The next prime is 21131022217. The reversal of 21131022201 is 10222013112.

It is not a de Polignac number, because 21131022201 - 2³ = 21131022193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21131022271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4013911 + ... + 4019171.

It is an arithmetic number, because the mean of its divisors is an integer number (906432120).

Almost surely, 2^21131022201 is an apocalyptic number.

It is an amenable number.

21131022201 is a deficient number, since it is larger than the sum of its proper divisors (7874805639).

21131022201 is a wasteful number, since it uses less digits than its factorization.

21131022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5617.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21131022201 its reverse (10222013112), we get a palindrome (31353035313).

The spelling of 21131022201 in words is "twenty-one billion, one hundred thirty-one million, twenty-two thousand, two hundred one".