21100243211030 has 32 divisors (see below), whose sum is σ = 39979875045600. Its totient is φ = 7995788266752.

The previous prime is 21100243210979. The next prime is 21100243211101. The reversal of 21100243211030 is 3011234200112.

It is a super-2 number, since 2×21100243211030² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21100243210993 and 21100243211011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16913594 + ... + 18118226.

It is an arithmetic number, because the mean of its divisors is an integer number (1249371095175).

Almost surely, 2^{21100243211030} is an apocalyptic number.

21100243211030 is a deficient number, since it is larger than the sum of its proper divisors (18879631834570).

21100243211030 is a wasteful number, since it uses less digits than its factorization.

21100243211030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296848.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21100243211030 its reverse (3011234200112), we get a palindrome (24111477411142).

The spelling of 21100243211030 in words is "twenty-one trillion, one hundred billion, two hundred forty-three million, two hundred eleven thousand, thirty".