1212233221031 has 16 divisors (see below), whose sum is σ = 1389495098880. Its totient is φ = 1035993717600.

The previous prime is 1212233221013. The next prime is 1212233221057. The reversal of 1212233221031 is 1301223322121.

It is a cyclic number.

It is not a de Polignac number, because 1212233221031 - 2²² = 1212229026727 is a prime.

It is a super-2 number, since 2×1212233221031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212233220988 and 1212233221006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212233221631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16803620 + ... + 16875606.

It is an arithmetic number, because the mean of its divisors is an integer number (86843443680).

Almost surely, 2^{1212233221031} is an apocalyptic number.

1212233221031 is a deficient number, since it is larger than the sum of its proper divisors (177261877849).

1212233221031 is an equidigital number, since it uses as much as digits as its factorization.

1212233221031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79054.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1212233221031 its reverse (1301223322121), we get a palindrome (2513456543152).

The spelling of 1212233221031 in words is "one trillion, two hundred twelve billion, two hundred thirty-three million, two hundred twenty-one thousand, thirty-one".