11212021210 has 64 divisors (see below), whose sum is σ = 22270308480. Its totient is φ = 4038577920.

The previous prime is 11212021207. The next prime is 11212021213. The reversal of 11212021210 is 1212021211.

It is an interprime number because it is at equal distance from previous prime (11212021207) and next prime (11212021213).

It is a super-2 number, since 2×11212021210² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (11212021213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1228765 + ... + 1237855.

It is an arithmetic number, because the mean of its divisors is an integer number (347973570).

Almost surely, 2^11212021210 is an apocalyptic number.

11212021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11212021210 is a deficient number, since it is larger than the sum of its proper divisors (11058287270).

11212021210 is a wasteful number, since it uses less digits than its factorization.

11212021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9343.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11212021210 its reverse (1212021211), we get a palindrome (12424042421).

Subtracting from 11212021210 its reverse (1212021211), we obtain a palindrome (9999999999).

The spelling of 11212021210 in words is "eleven billion, two hundred twelve million, twenty-one thousand, two hundred ten".