21100210012 has 24 divisors (see below), whose sum is σ = 42203921760. Its totient is φ = 9042196800.

The previous prime is 21100210007. The next prime is 21100210013. The reversal of 21100210012 is 21001200112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100210013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433314 + ... + 479542.

It is an arithmetic number, because the mean of its divisors is an integer number (1758496740).

Almost surely, 2^21100210012 is an apocalyptic number.

It is an amenable number.

21100210012 is an abundant number, since it is smaller than the sum of its proper divisors (21103711748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21100210012 is a wasteful number, since it uses less digits than its factorization.

21100210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62541 (or 62539 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21100210012 its reverse (21001200112), we get a palindrome (42101410124).

The spelling of 21100210012 in words is "twenty-one billion, one hundred million, two hundred ten thousand, twelve".