1212022243140 has 24 divisors (see below), whose sum is σ = 3393662280960. Its totient is φ = 323205931488.

The previous prime is 1212022243123. The next prime is 1212022243181. The reversal of 1212022243140 is 413422202121.

It is a super-2 number, since 2×1212022243140² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1212022243140.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10100185300 + ... + 10100185419.

It is an arithmetic number, because the mean of its divisors is an integer number (141402595040).

Almost surely, 2^{1212022243140} is an apocalyptic number.

1212022243140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212022243140 is an abundant number, since it is smaller than the sum of its proper divisors (2181640037820).

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

1212022243140 is a wasteful number, since it uses less digits than its factorization.

1212022243140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20200370731 (or 20200370729 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 1212022243140 its reverse (413422202121), we get a palindrome (1625444445261).

The spelling of 1212022243140 in words is "one trillion, two hundred twelve billion, twenty-two million, two hundred forty-three thousand, one hundred forty".