212100102123 has 64 divisors (see below), whose sum is σ = 354874920960. Its totient is φ = 109704803328.

The previous prime is 212100102103. The next prime is 212100102131. The reversal of 212100102123 is 321201001212.

It is not a de Polignac number, because 212100102123 - 2⁵ = 212100102091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212100102103) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3416958 + ... + 3478476.

It is an arithmetic number, because the mean of its divisors is an integer number (5544920640).

Almost surely, 2^212100102123 is an apocalyptic number.

212100102123 is a deficient number, since it is larger than the sum of its proper divisors (142774818837).

212100102123 is a wasteful number, since it uses less digits than its factorization.

212100102123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61788.

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

Adding to 212100102123 its reverse (321201001212), we get a palindrome (533301103335).

The spelling of 212100102123 in words is "two hundred twelve billion, one hundred million, one hundred two thousand, one hundred twenty-three".