11211010221111 has 16 divisors (see below), whose sum is σ = 14954518781664. Its totient is φ = 7470754550784.

The previous prime is 11211010221101. The next prime is 11211010221223. The reversal of 11211010221111 is 11112201011211.

It is not a de Polignac number, because 11211010221111 - 2²⁹ = 11210473350199 is a prime.

It is a super-4 number, since 4×11211010221111⁴ (a number of 53 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211010221101) 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, 277253551 + ... + 277293983.

It is an arithmetic number, because the mean of its divisors is an integer number (934657423854).

Almost surely, 2^{11211010221111} is an apocalyptic number.

11211010221111 is a deficient number, since it is larger than the sum of its proper divisors (3743508560553).

11211010221111 is a wasteful number, since it uses less digits than its factorization.

11211010221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78370.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 11211010221111 its reverse (11112201011211), we get a palindrome (22323211232322).

The spelling of 11211010221111 in words is "eleven trillion, two hundred eleven billion, ten million, two hundred twenty-one thousand, one hundred eleven".