221012210001 has 32 divisors (see below), whose sum is σ = 347537664000. Its totient is φ = 123467302080.

The previous prime is 221012209973. The next prime is 221012210021. The reversal of 221012210001 is 100012210122.

It is not a de Polignac number, because 221012210001 - 2⁹ = 221012209489 is a prime.

It is a super-2 number, since 2×221012210001² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221012210021) 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, 4740201 + ... + 4786598.

It is an arithmetic number, because the mean of its divisors is an integer number (10860552000).

Almost surely, 2^221012210001 is an apocalyptic number.

It is an amenable number.

221012210001 is a deficient number, since it is larger than the sum of its proper divisors (126525453999).

221012210001 is a wasteful number, since it uses less digits than its factorization.

221012210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9526869.

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

Adding to 221012210001 its reverse (100012210122), we get a palindrome (321024420123).

It can be divided in two parts, 2210122 and 10001, that multiplied together give a palindrome (22103430122).

The spelling of 221012210001 in words is "two hundred twenty-one billion, twelve million, two hundred ten thousand, one".