1121221012212 has 96 divisors (see below), whose sum is σ = 3330259833600. Its totient is φ = 319565523456.

The previous prime is 1121221012211. The next prime is 1121221012231. The reversal of 1121221012212 is 2122101221211.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121221012211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1503873 + ... + 2122280.

It is an arithmetic number, because the mean of its divisors is an integer number (34690206600).

Almost surely, 2^{1121221012212} is an apocalyptic number.

1121221012212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121221012212 is an abundant number, since it is smaller than the sum of its proper divisors (2209038821388).

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

1121221012212 is a wasteful number, since it uses less digits than its factorization.

1121221012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626582 (or 3626574 counting only the distinct ones).

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

Adding to 1121221012212 its reverse (2122101221211), we get a palindrome (3243322233423).

It can be divided in two parts, 11 and 21221012212, that multiplied together give a palindrome (233431134332).

The spelling of 1121221012212 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-one million, twelve thousand, two hundred twelve".