11211002121 has 64 divisors (see below), whose sum is σ = 17530774272. Its totient is φ = 6297600000.

The previous prime is 11211002113. The next prime is 11211002123. The reversal of 11211002121 is 12120011211.

It is not a de Polignac number, because 11211002121 - 2³ = 11211002113 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11211002097 and 11211002106.

It is not an unprimeable number, because it can be changed into a prime (11211002123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13654891 + ... + 13655711.

It is an arithmetic number, because the mean of its divisors is an integer number (273918348).

Almost surely, 2^11211002121 is an apocalyptic number.

11211002121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11211002121 is a deficient number, since it is larger than the sum of its proper divisors (6319772151).

11211002121 is a wasteful number, since it uses less digits than its factorization.

11211002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194.

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

Adding to 11211002121 its reverse (12120011211), we get a palindrome (23331013332).

The spelling of 11211002121 in words is "eleven billion, two hundred eleven million, two thousand, one hundred twenty-one".