1212111155672 has 24 divisors (see below), whose sum is σ = 2414261194860. Its totient is φ = 570405248640.

The previous prime is 1212111155669. The next prime is 1212111155729. The reversal of 1212111155672 is 2765511112121.

It is a super-2 number, since 2×1212111155672² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 262132454 + ... + 262137077.

Almost surely, 2^{1212111155672} is an apocalyptic number.

It is an amenable number.

1212111155672 is a deficient number, since it is larger than the sum of its proper divisors (1202150039188).

1212111155672 is a wasteful number, since it uses less digits than its factorization.

1212111155672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524269571 (or 524269550 counting only the distinct ones).

The product of its digits is 8400, while the sum is 35.

Adding to 1212111155672 its reverse (2765511112121), we get a palindrome (3977622267793).

The spelling of 1212111155672 in words is "one trillion, two hundred twelve billion, one hundred eleven million, one hundred fifty-five thousand, six hundred seventy-two".