1210121323231 has 8 divisors (see below), whose sum is σ = 1220744541600. Its totient is φ = 1199531459808.

The previous prime is 1210121323189. The next prime is 1210121323273. The reversal of 1210121323231 is 1323231210121.

It is an interprime number because it is at equal distance from previous prime (1210121323189) and next prime (1210121323273).

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 1210121323231 - 2²³ = 1210112934623 is a prime.

It is a super-2 number, since 2×1210121323231² (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 (1210121323291) 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 7 ways as a sum of consecutive naturals, for example, 8265856 + ... + 8410981.

It is an arithmetic number, because the mean of its divisors is an integer number (152593067700).

Almost surely, 2^{1210121323231} is an apocalyptic number.

1210121323231 is a deficient number, since it is larger than the sum of its proper divisors (10623218369).

1210121323231 is a wasteful number, since it uses less digits than its factorization.

1210121323231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16677473.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1210121323231 its reverse (1323231210121), we get a palindrome (2533352533352).

The spelling of 1210121323231 in words is "one trillion, two hundred ten billion, one hundred twenty-one million, three hundred twenty-three thousand, two hundred thirty-one".