2121111200001 has 32 divisors (see below), whose sum is σ = 3107213153280. Its totient is φ = 1281081700800.

The previous prime is 2121111199927. The next prime is 2121111200009. The reversal of 2121111200001 is 1000021111212.

It is not a de Polignac number, because 2121111200001 - 2⁷ = 2121111199873 is a prime.

It is a super-2 number, since 2×2121111200001² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121111200001.

It is not an unprimeable number, because it can be changed into a prime (2121111200009) 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, 5070346 + ... + 5472716.

It is an arithmetic number, because the mean of its divisors is an integer number (97100411040).

Almost surely, 2^{2121111200001} is an apocalyptic number.

It is an amenable number.

2121111200001 is a deficient number, since it is larger than the sum of its proper divisors (986101953279).

2121111200001 is a wasteful number, since it uses less digits than its factorization.

2121111200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406437.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2121111200001 its reverse (1000021111212), we get a palindrome (3121132311213).

The spelling of 2121111200001 in words is "two trillion, one hundred twenty-one billion, one hundred eleven million, two hundred thousand, one".