21212011011201 has 8 divisors (see below), whose sum is σ = 28282772197440. Its totient is φ = 14141295249552.

The previous prime is 21212011011167. The next prime is 21212011011229. The reversal of 21212011011201 is 10211011021212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21212011011201 - 2³³ = 21203421076609 is a prime.

It is a super-2 number, since 2×21212011011201² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21212011011271) 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, 10251186 + ... + 12145403.

It is an arithmetic number, because the mean of its divisors is an integer number (3535346524680).

Almost surely, 2^{21212011011201} is an apocalyptic number.

It is an amenable number.

21212011011201 is a deficient number, since it is larger than the sum of its proper divisors (7070761186239).

21212011011201 is a wasteful number, since it uses less digits than its factorization.

21212011011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22712295.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21212011011201 its reverse (10211011021212), we get a palindrome (31423022032413).

The spelling of 21212011011201 in words is "twenty-one trillion, two hundred twelve billion, eleven million, eleven thousand, two hundred one".