21211002201 has 32 divisors (see below), whose sum is σ = 30699648000. Its totient is φ = 12986270528.

The previous prime is 21211002199. The next prime is 21211002209. The reversal of 21211002201 is 10220011212.

It is not a de Polignac number, because 21211002201 - 2¹ = 21211002199 is a prime.

It is a super-2 number, since 2×21211002201² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21211002209) 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, 328570 + ... + 387788.

It is an arithmetic number, because the mean of its divisors is an integer number (959364000).

Almost surely, 2^21211002201 is an apocalyptic number.

It is an amenable number.

21211002201 is a deficient number, since it is larger than the sum of its proper divisors (9488645799).

21211002201 is a wasteful number, since it uses less digits than its factorization.

21211002201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59453.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21211002201 its reverse (10220011212), we get a palindrome (31431013413).

The spelling of 21211002201 in words is "twenty-one billion, two hundred eleven million, two thousand, two hundred one".