1131222021252 has 12 divisors (see below), whose sum is σ = 2639518049616. Its totient is φ = 377074007080.

The previous prime is 1131222021247. The next prime is 1131222021253. The reversal of 1131222021252 is 2521202221311.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1131222021252² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1131222021253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47134250874 + ... + 47134250897.

It is an arithmetic number, because the mean of its divisors is an integer number (219959837468).

Almost surely, 2^{1131222021252} is an apocalyptic number.

1131222021252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1131222021252 is an abundant number, since it is smaller than the sum of its proper divisors (1508296028364).

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

1131222021252 is a wasteful number, since it uses less digits than its factorization.

1131222021252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94268501778 (or 94268501776 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 1131222021252 its reverse (2521202221311), we get a palindrome (3652424242563).

The spelling of 1131222021252 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-two million, twenty-one thousand, two hundred fifty-two".