22121001001 has 8 divisors (see below), whose sum is σ = 25551530784. Its totient is φ = 18927059520.

The previous prime is 22121000983. The next prime is 22121001011. The reversal of 22121001001 is 10010012122.

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

It is a cyclic number.

It is not a de Polignac number, because 22121001001 - 2³¹ = 19973517353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22121001011) 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, 59146875 + ... + 59147248.

It is an arithmetic number, because the mean of its divisors is an integer number (3193941348).

Almost surely, 2^22121001001 is an apocalyptic number.

It is an amenable number.

22121001001 is a deficient number, since it is larger than the sum of its proper divisors (3430529783).

22121001001 is a wasteful number, since it uses less digits than its factorization.

22121001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118294151.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 22121001001 its reverse (10010012122), we get a palindrome (32131013123).

The spelling of 22121001001 in words is "twenty-two billion, one hundred twenty-one million, one thousand, one".