2121201200111 has 16 divisors (see below), whose sum is σ = 2602984273920. Its totient is φ = 1687119423360.

The previous prime is 2121201200029. The next prime is 2121201200119. The reversal of 2121201200111 is 1110021021212.

It is not a de Polignac number, because 2121201200111 - 2¹⁴ = 2121201183727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121201200119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125521271 + ... + 125538168.

It is an arithmetic number, because the mean of its divisors is an integer number (162686517120).

Almost surely, 2^{2121201200111} is an apocalyptic number.

2121201200111 is a deficient number, since it is larger than the sum of its proper divisors (481783073809).

2121201200111 is a wasteful number, since it uses less digits than its factorization.

2121201200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251059534.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2121201200111 its reverse (1110021021212), we get a palindrome (3231222221323).

The spelling of 2121201200111 in words is "two trillion, one hundred twenty-one billion, two hundred one million, two hundred thousand, one hundred eleven".