11211222012012 has 108 divisors (see below), whose sum is σ = 31677971499720. Its totient is φ = 3339757893120.

The previous prime is 11211222011959. The next prime is 11211222012077. The reversal of 11211222012012 is 21021022211211.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21554373 + ... + 22068380.

Almost surely, 2^{11211222012012} is an apocalyptic number.

11211222012012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11211222012012 is an abundant number, since it is smaller than the sum of its proper divisors (20466749487708).

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

11211222012012 is a wasteful number, since it uses less digits than its factorization.

11211222012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43622844 (or 43622828 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11211222012012 its reverse (21021022211211), we get a palindrome (32232244223223).

The spelling of 11211222012012 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-two million, twelve thousand, twelve".