200101212123 has 32 divisors (see below), whose sum is σ = 284946157056. Its totient is φ = 124602686208.

The previous prime is 200101212121. The next prime is 200101212127. The reversal of 200101212123 is 321212101002.

It is not a de Polignac number, because 200101212123 - 2¹ = 200101212121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (200101212121) 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, 21289461 + ... + 21298857.

It is an arithmetic number, because the mean of its divisors is an integer number (8904567408).

Almost surely, 2^200101212123 is an apocalyptic number.

200101212123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

200101212123 is a deficient number, since it is larger than the sum of its proper divisors (84844944933).

200101212123 is a wasteful number, since it uses less digits than its factorization.

200101212123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16643.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 200101212123 its reverse (321212101002), we get a palindrome (521313313125).

The spelling of 200101212123 in words is "two hundred billion, one hundred one million, two hundred twelve thousand, one hundred twenty-three".