21012010100312 has 64 divisors (see below), whose sum is σ = 52008336714240. Its totient is φ = 7704938764800.

The previous prime is 21012010100311. The next prime is 21012010100317. The reversal of 21012010100312 is 21300101021012.

It is a super-2 number, since 2×21012010100312² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012010100311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1003236764 + ... + 1003257707.

It is an arithmetic number, because the mean of its divisors is an integer number (812630261160).

Almost surely, 2^{21012010100312} is an apocalyptic number.

21012010100312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21012010100312 is an abundant number, since it is smaller than the sum of its proper divisors (30996326613928).

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

21012010100312 is a wasteful number, since it uses less digits than its factorization.

21012010100312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006494512 (or 2006494508 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21012010100312 its reverse (21300101021012), we get a palindrome (42312111121324).

The spelling of 21012010100312 in words is "twenty-one trillion, twelve billion, ten million, one hundred thousand, three hundred twelve".