1231123213030 has 16 divisors (see below), whose sum is σ = 2223585003024. Its totient is φ = 490768569760.

The previous prime is 1231123212983. The next prime is 1231123213121. The reversal of 1231123213030 is 303123211321.

It is a super-2 number, since 2×1231123213030² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231123212992 and 1231123213010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210086356 + ... + 210092215.

It is an arithmetic number, because the mean of its divisors is an integer number (138974062689).

Almost surely, 2^{1231123213030} is an apocalyptic number.

1231123213030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231123213030 is a deficient number, since it is larger than the sum of its proper divisors (992461789994).

1231123213030 is a wasteful number, since it uses less digits than its factorization.

1231123213030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420178871.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1231123213030 its reverse (303123211321), we get a palindrome (1534246424351).

The spelling of 1231123213030 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-three million, two hundred thirteen thousand, thirty".