1210121131323 has 32 divisors (see below), whose sum is σ = 1748264795200. Its totient is φ = 744530911488.

The previous prime is 1210121131309. The next prime is 1210121131333. The reversal of 1210121131323 is 3231311210121.

It is not a de Polignac number, because 1210121131323 - 2⁹ = 1210121130811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1210121131323.

It is not an unprimeable number, because it can be changed into a prime (1210121131333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35818383 + ... + 35852151.

It is an arithmetic number, because the mean of its divisors is an integer number (54633274850).

Almost surely, 2^{1210121131323} is an apocalyptic number.

1210121131323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1210121131323 is a deficient number, since it is larger than the sum of its proper divisors (538143663877).

1210121131323 is an equidigital number, since it uses as much as digits as its factorization.

1210121131323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39248 (or 39222 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1210121131323 its reverse (3231311210121), we get a palindrome (4441432341444).

The spelling of 1210121131323 in words is "one trillion, two hundred ten billion, one hundred twenty-one million, one hundred thirty-one thousand, three hundred twenty-three".