1212111123 has 8 divisors (see below), whose sum is σ = 1620369408. Its totient is φ = 805963464.

The previous prime is 1212111119. The next prime is 1212111139. The reversal of 1212111123 is 3211112121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1212111123 - 2² = 1212111119 is a prime.

It is a super-2 number, since 2×1212111123² = 2938426749000642258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1212111143) 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, 526315 + ... + 528612.

It is an arithmetic number, because the mean of its divisors is an integer number (202546176).

Almost surely, 2^1212111123 is an apocalyptic number.

1212111123 is a deficient number, since it is larger than the sum of its proper divisors (408258285).

1212111123 is a wasteful number, since it uses less digits than its factorization.

1212111123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055313.

The product of its digits is 24, while the sum is 15.

The square root of 1212111123 is about 34815.3862968659. The cubic root of 1212111123 is about 1066.2216060043.

Adding to 1212111123 its reverse (3211112121), we get a palindrome (4423223244).

The spelling of 1212111123 in words is "one billion, two hundred twelve million, one hundred eleven thousand, one hundred twenty-three".