201030202123 has 4 divisors (see below), whose sum is σ = 201092851080. Its totient is φ = 200967553168.

The previous prime is 201030202117. The next prime is 201030202127. The reversal of 201030202123 is 321202030102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321202030102 = 2 ⋅160601015051.

It is a cyclic number.

It is not a de Polignac number, because 201030202123 - 2²¹ = 201028104971 is a prime.

It is a super-2 number, since 2×201030202123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201030202097 and 201030202106.

It is not an unprimeable number, because it can be changed into a prime (201030202127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31319665 + ... + 31326082.

It is an arithmetic number, because the mean of its divisors is an integer number (50273212770).

Almost surely, 2^201030202123 is an apocalyptic number.

201030202123 is a deficient number, since it is larger than the sum of its proper divisors (62648957).

201030202123 is an equidigital number, since it uses as much as digits as its factorization.

201030202123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62648956.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 201030202123 its reverse (321202030102), we get a palindrome (522232232225).

The spelling of 201030202123 in words is "two hundred one billion, thirty million, two hundred two thousand, one hundred twenty-three".