1212212131 has 8 divisors (see below), whose sum is σ = 1330091280. Its totient is φ = 1097851872.

The previous prime is 1212212123. The next prime is 1212212147. The reversal of 1212212131 is 1312122121.

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

It is not a de Polignac number, because 1212212131 - 2³ = 1212212123 is a prime.

It is a super-2 number, since 2×1212212131² = 2938916501087122322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212212101) 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, 879001 + ... + 880378.

It is an arithmetic number, because the mean of its divisors is an integer number (166261410).

Almost surely, 2^1212212131 is an apocalyptic number.

1212212131 is a deficient number, since it is larger than the sum of its proper divisors (117879149).

1212212131 is a wasteful number, since it uses less digits than its factorization.

1212212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759445.

The product of its digits is 48, while the sum is 16.

The square root of 1212212131 is about 34816.8368896429. The cubic root of 1212212131 is about 1066.2512220790.

Adding to 1212212131 its reverse (1312122121), we get a palindrome (2524334252).

The spelling of 1212212131 in words is "one billion, two hundred twelve million, two hundred twelve thousand, one hundred thirty-one".