21011022201 has 16 divisors (see below), whose sum is σ = 30277054080. Its totient is φ = 12883839360.

The previous prime is 21011022199. The next prime is 21011022217. The reversal of 21011022201 is 10222011012.

It is not a de Polignac number, because 21011022201 - 2¹ = 21011022199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21011022271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 947661 + ... + 969578.

It is an arithmetic number, because the mean of its divisors is an integer number (1892315880).

Almost surely, 2^21011022201 is an apocalyptic number.

It is an amenable number.

21011022201 is a deficient number, since it is larger than the sum of its proper divisors (9266031879).

21011022201 is a wasteful number, since it uses less digits than its factorization.

21011022201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917536.

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

Adding to 21011022201 its reverse (10222011012), we get a palindrome (31233033213).

The spelling of 21011022201 in words is "twenty-one billion, eleven million, twenty-two thousand, two hundred one".