11111022001212 has 48 divisors (see below), whose sum is σ = 29631345606912. Its totient is φ = 3174368400000.

The previous prime is 11111022001207. The next prime is 11111022001223. The reversal of 11111022001212 is 21210022011111.

It is a happy number.

It is a super-2 number, since 2×11111022001212² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11111022001191 and 11111022001200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3076914 + ... + 5629337.

It is an arithmetic number, because the mean of its divisors is an integer number (617319700144).

Almost surely, 2^{11111022001212} is an apocalyptic number.

11111022001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11111022001212 is an abundant number, since it is smaller than the sum of its proper divisors (18520323605700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11111022001212 is a wasteful number, since it uses less digits than its factorization.

11111022001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8721458 (or 8721456 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11111022001212 its reverse (21210022011111), we get a palindrome (32321044012323).

The spelling of 11111022001212 in words is "eleven trillion, one hundred eleven billion, twenty-two million, one thousand, two hundred twelve".