2111556207211 has 16 divisors (see below), whose sum is σ = 2353587337728. Its totient is φ = 1877907146400.

The previous prime is 2111556207209. The next prime is 2111556207317. The reversal of 2111556207211 is 1127026551112.

It is not a de Polignac number, because 2111556207211 - 2¹ = 2111556207209 is a prime.

It is a super-2 number, since 2×2111556207211² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2111556202211) 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, 228796 + ... + 2067718.

It is an arithmetic number, because the mean of its divisors is an integer number (147099208608).

Almost surely, 2^{2111556207211} is an apocalyptic number.

2111556207211 is a deficient number, since it is larger than the sum of its proper divisors (242031130517).

2111556207211 is a wasteful number, since it uses less digits than its factorization.

2111556207211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841202.

The product of its (nonzero) digits is 8400, while the sum is 34.

The spelling of 2111556207211 in words is "two trillion, one hundred eleven billion, five hundred fifty-six million, two hundred seven thousand, two hundred eleven".