21031010331012 has 60 divisors (see below), whose sum is σ = 59977325768976. Its totient is φ = 6373033432560.

The previous prime is 21031010331011. The next prime is 21031010331013. The reversal of 21031010331012 is 21013301013012.

21031010331012 is a `hidden beast` number, since 2 + 1 + 0 + 310 + 10 + 331 + 0 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (21031010331011) and next prime (21031010331013).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21031010331011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2950474878 + ... + 2950482005.

Almost surely, 2^{21031010331012} is an apocalyptic number.

21031010331012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21031010331012 is an abundant number, since it is smaller than the sum of its proper divisors (38946315437964).

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

21031010331012 is a wasteful number, since it uses less digits than its factorization.

21031010331012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5900956910 (or 5900956899 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21031010331012 its reverse (21013301013012), we get a palindrome (42044311344024).

The spelling of 21031010331012 in words is "twenty-one trillion, thirty-one billion, ten million, three hundred thirty-one thousand, twelve".