21112202001 has 8 divisors (see below), whose sum is σ = 30708657504. Its totient is φ = 12795273920.

The previous prime is 21112201991. The next prime is 21112202093. The reversal of 21112202001 is 10020221112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21112202001 - 2³³ = 12522267409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112402001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319881816 + ... + 319881881.

It is an arithmetic number, because the mean of its divisors is an integer number (3838582188).

Almost surely, 2^21112202001 is an apocalyptic number.

It is an amenable number.

21112202001 is a deficient number, since it is larger than the sum of its proper divisors (9596455503).

21112202001 is a wasteful number, since it uses less digits than its factorization.

21112202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639763711.

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

Adding to 21112202001 its reverse (10020221112), we get a palindrome (31132423113).

The spelling of 21112202001 in words is "twenty-one billion, one hundred twelve million, two hundred two thousand, one".