2111212001 has 4 divisors (see below), whose sum is σ = 2113373892. Its totient is φ = 2109050112.

The previous prime is 2111211983. The next prime is 2111212043. The reversal of 2111212001 is 1002121112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1445520400 + 665691601 = 38020^2 + 25801^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111212001 - 2⁶ = 2111211937 is a prime.

It is a super-2 number, since 2×2111212001² = 8914432226332848002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111212091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1079480 + ... + 1081433.

It is an arithmetic number, because the mean of its divisors is an integer number (528343473).

Almost surely, 2^2111212001 is an apocalyptic number.

It is an amenable number.

2111212001 is a deficient number, since it is larger than the sum of its proper divisors (2161891).

2111212001 is an equidigital number, since it uses as much as digits as its factorization.

2111212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161890.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2111212001 is about 45947.9270587912. The cubic root of 2111212001 is about 1282.8541456186.

Adding to 2111212001 its reverse (1002121112), we get a palindrome (3113333113).

The spelling of 2111212001 in words is "two billion, one hundred eleven million, two hundred twelve thousand, one".