2111212221001 has 8 divisors (see below), whose sum is σ = 2273677165760. Its totient is φ = 1948756419792.

The previous prime is 2111212220993. The next prime is 2111212221113. The reversal of 2111212221001 is 1001222121112.

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

It is not a de Polignac number, because 2111212221001 - 2³ = 2111212220993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2111212221901) 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, 1802541 + ... + 2733418.

It is an arithmetic number, because the mean of its divisors is an integer number (284209645720).

Almost surely, 2^{2111212221001} is an apocalyptic number.

It is an amenable number.

2111212221001 is a deficient number, since it is larger than the sum of its proper divisors (162464944759).

2111212221001 is a wasteful number, since it uses less digits than its factorization.

2111212221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4571775.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2111212221001 its reverse (1001222121112), we get a palindrome (3112434342113).

The spelling of 2111212221001 in words is "two trillion, one hundred eleven billion, two hundred twelve million, two hundred twenty-one thousand, one".