21021201110212 has 12 divisors (see below), whose sum is σ = 37291034846716. Its totient is φ = 10366619725440.

The previous prime is 21021201110191. The next prime is 21021201110233. The reversal of 21021201110212 is 21201110212012.

It is an interprime number because it is at equal distance from previous prime (21021201110191) and next prime (21021201110233).

It can be written as a sum of positive squares in 2 ways, for example, as 4757354250496 + 16263846859716 = 2181136^2 + 4032846^2 .

It is a super-2 number, since 2×21021201110212² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35995207089 + ... + 35995207672.

Almost surely, 2^{21021201110212} is an apocalyptic number.

It is an amenable number.

21021201110212 is a deficient number, since it is larger than the sum of its proper divisors (16269833736504).

21021201110212 is a wasteful number, since it uses less digits than its factorization.

21021201110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71990414838 (or 71990414836 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21021201110212 its reverse (21201110212012), we get a palindrome (42222311322224).

The spelling of 21021201110212 in words is "twenty-one trillion, twenty-one billion, two hundred one million, one hundred ten thousand, two hundred twelve".