20210100123 has 32 divisors (see below), whose sum is σ = 28774497024. Its totient is φ = 12573258752.

The previous prime is 20210100107. The next prime is 20210100133. The reversal of 20210100123 is 32100101202.

It is not a de Polignac number, because 20210100123 - 2⁴ = 20210100107 is a prime.

It is a super-3 number, since 3×20210100123³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20210100099 and 20210100108.

It is not an unprimeable number, because it can be changed into a prime (20210100133) 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, 9969436 + ... + 9971462.

It is an arithmetic number, because the mean of its divisors is an integer number (899203032).

Almost surely, 2^20210100123 is an apocalyptic number.

20210100123 is a deficient number, since it is larger than the sum of its proper divisors (8564396901).

20210100123 is a wasteful number, since it uses less digits than its factorization.

20210100123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20210100123 its reverse (32100101202), we get a palindrome (52310201325).

The spelling of 20210100123 in words is "twenty billion, two hundred ten million, one hundred thousand, one hundred twenty-three".