1211196157872 has 40 divisors (see below), whose sum is σ = 3312977728176. Its totient is φ = 379983108096.

The previous prime is 1211196157817. The next prime is 1211196157879. The reversal of 1211196157872 is 2787516911121.

It is a super-2 number, since 2×1211196157872² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (1211196157879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742153693 + ... + 742155324.

Almost surely, 2^{1211196157872} is an apocalyptic number.

1211196157872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211196157872 is an abundant number, since it is smaller than the sum of its proper divisors (2101781570304).

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

1211196157872 is a wasteful number, since it uses less digits than its factorization.

1211196157872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484309045 (or 1484309039 counting only the distinct ones).

The product of its digits is 423360, while the sum is 51.

The spelling of 1211196157872 in words is "one trillion, two hundred eleven billion, one hundred ninety-six million, one hundred fifty-seven thousand, eight hundred seventy-two".