1212112221031 has 8 divisors (see below), whose sum is σ = 1253943337680. Its totient is φ = 1170283380672.

The previous prime is 1212112221013. The next prime is 1212112221043. The reversal of 1212112221031 is 1301222112121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212112221031 - 2²¹ = 1212110123879 is a prime.

It is a super-2 number, since 2×1212112221031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212112224031) 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, 551736 + ... + 1651858.

It is an arithmetic number, because the mean of its divisors is an integer number (156742917210).

Almost surely, 2^{1212112221031} is an apocalyptic number.

1212112221031 is a deficient number, since it is larger than the sum of its proper divisors (41831116649).

1212112221031 is a wasteful number, since it uses less digits than its factorization.

1212112221031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138145.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1212112221031 its reverse (1301222112121), we get a palindrome (2513334333152).

The spelling of 1212112221031 in words is "one trillion, two hundred twelve billion, one hundred twelve million, two hundred twenty-one thousand, thirty-one".