21211010220012 has 24 divisors (see below), whose sum is σ = 52097218084800. Its totient is φ = 6698213753616.

The previous prime is 21211010220011. The next prime is 21211010220013. The reversal of 21211010220012 is 21002201011212.

It is an interprime number because it is at equal distance from previous prime (21211010220011) and next prime (21211010220013).

It is a super-3 number, since 3×21211010220012³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21211010219973 and 21211010220000.

It is not an unprimeable number, because it can be changed into a prime (21211010220011) 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, 46515373062 + ... + 46515373517.

It is an arithmetic number, because the mean of its divisors is an integer number (2170717420200).

Almost surely, 2^{21211010220012} is an apocalyptic number.

It is an amenable number.

21211010220012 is an abundant number, since it is smaller than the sum of its proper divisors (30886207864788).

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

21211010220012 is a wasteful number, since it uses less digits than its factorization.

21211010220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93030746605 (or 93030746603 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21211010220012 its reverse (21002201011212), we get a palindrome (42213211231224).

The spelling of 21211010220012 in words is "twenty-one trillion, two hundred eleven billion, ten million, two hundred twenty thousand, twelve".