2101212132123 has 32 divisors (see below), whose sum is σ = 3243494016000. Its totient is φ = 1198934355456.

The previous prime is 2101212132059. The next prime is 2101212132137. The reversal of 2101212132123 is 3212312121012.

It is not a de Polignac number, because 2101212132123 - 2⁶ = 2101212132059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2101212132123.

It is not an unprimeable number, because it can be changed into a prime (2101212132193) 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 31 ways as a sum of consecutive naturals, for example, 30131598 + ... + 30201251.

It is an arithmetic number, because the mean of its divisors is an integer number (101359188000).

Almost surely, 2^{2101212132123} is an apocalyptic number.

2101212132123 is a deficient number, since it is larger than the sum of its proper divisors (1142281883877).

2101212132123 is a wasteful number, since it uses less digits than its factorization.

2101212132123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60332931.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 2101212132123 its reverse (3212312121012), we get a palindrome (5313524253135).

The spelling of 2101212132123 in words is "two trillion, one hundred one billion, two hundred twelve million, one hundred thirty-two thousand, one hundred twenty-three".