2101202100123 has 64 divisors (see below), whose sum is σ = 3380684774400. Its totient is φ = 1134010091520.

The previous prime is 2101202100121. The next prime is 2101202100223. The reversal of 2101202100123 is 3210012021012.

It is not a de Polignac number, because 2101202100123 - 2¹ = 2101202100121 is a prime.

It is a super-2 number, since 2×2101202100123² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2101202100121) 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, 186386815 + ... + 186398087.

It is an arithmetic number, because the mean of its divisors is an integer number (52823199600).

Almost surely, 2^{2101202100123} is an apocalyptic number.

2101202100123 is a deficient number, since it is larger than the sum of its proper divisors (1279482674277).

2101202100123 is a wasteful number, since it uses less digits than its factorization.

2101202100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12692.

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

Adding to 2101202100123 its reverse (3210012021012), we get a palindrome (5311214121135).

The spelling of 2101202100123 in words is "two trillion, one hundred one billion, two hundred two million, one hundred thousand, one hundred twenty-three".