2121020210123 has 8 divisors (see below), whose sum is σ = 2122000742400. Its totient is φ = 2120039820648.

The previous prime is 2121020210093. The next prime is 2121020210131. The reversal of 2121020210123 is 3210120201212.

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 2121020210123 - 2²² = 2121016015819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121020230123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39281018 + ... + 39334976.

It is an arithmetic number, because the mean of its divisors is an integer number (265250092800).

Almost surely, 2^{2121020210123} is an apocalyptic number.

2121020210123 is a deficient number, since it is larger than the sum of its proper divisors (980532277).

2121020210123 is a wasteful number, since it uses less digits than its factorization.

2121020210123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71401.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 2121020210123 its reverse (3210120201212), we get a palindrome (5331140411335).

The spelling of 2121020210123 in words is "two trillion, one hundred twenty-one billion, twenty million, two hundred ten thousand, one hundred twenty-three".