21021210101012 has 48 divisors (see below), whose sum is σ = 41943234957120. Its totient is φ = 9130500019200.

The previous prime is 21021210100991. The next prime is 21021210101051. The reversal of 21021210101012 is 21010101212012.

It is a super-2 number, since 2×21021210101012² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 84795314 + ... + 85042857.

It is an arithmetic number, because the mean of its divisors is an integer number (873817394940).

Almost surely, 2^{21021210101012} is an apocalyptic number.

21021210101012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21021210101012 is a deficient number, since it is larger than the sum of its proper divisors (20922024856108).

21021210101012 is a wasteful number, since it uses less digits than its factorization.

21021210101012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169838312 (or 169838310 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21021210101012 its reverse (21010101212012), we get a palindrome (42031311313024).

The spelling of 21021210101012 in words is "twenty-one trillion, twenty-one billion, two hundred ten million, one hundred one thousand, twelve".