1210021331123 has 24 divisors (see below), whose sum is σ = 1441194709680. Its totient is φ = 1006188240960.

The previous prime is 1210021331081. The next prime is 1210021331143. The reversal of 1210021331123 is 3211331200121.

It is a happy number.

It is not a de Polignac number, because 1210021331123 - 2¹² = 1210021327027 is a prime.

It is a super-2 number, since 2×1210021331123² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1210021331095 and 1210021331104.

It is not an unprimeable number, because it can be changed into a prime (1210021331143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5138540 + ... + 5368857.

It is an arithmetic number, because the mean of its divisors is an integer number (60049779570).

Almost surely, 2^{1210021331123} is an apocalyptic number.

1210021331123 is a deficient number, since it is larger than the sum of its proper divisors (231173378557).

1210021331123 is a wasteful number, since it uses less digits than its factorization.

1210021331123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10507475 (or 10507456 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1210021331123 its reverse (3211331200121), we get a palindrome (4421352531244).

The spelling of 1210021331123 in words is "one trillion, two hundred ten billion, twenty-one million, three hundred thirty-one thousand, one hundred twenty-three".