210020202123 has 32 divisors (see below), whose sum is σ = 292223054592. Its totient is φ = 134050320000.

The previous prime is 210020202083. The next prime is 210020202157. The reversal of 210020202123 is 321202020012.

It is a happy number.

It is not a de Polignac number, because 210020202123 - 2¹⁸ = 210019939979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210020202023) 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, 2267053 + ... + 2357873.

It is an arithmetic number, because the mean of its divisors is an integer number (9131970456).

Almost surely, 2^210020202123 is an apocalyptic number.

210020202123 is a deficient number, since it is larger than the sum of its proper divisors (82202852469).

210020202123 is a wasteful number, since it uses less digits than its factorization.

210020202123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91195.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 210020202123 its reverse (321202020012), we get a palindrome (531222222135).

The spelling of 210020202123 in words is "two hundred ten billion, twenty million, two hundred two thousand, one hundred twenty-three".