21010012212201 has 16 divisors (see below), whose sum is σ = 28045033276800. Its totient is φ = 13990834626048.

The previous prime is 21010012212191. The next prime is 21010012212271. The reversal of 21010012212201 is 10221221001012.

It is not a de Polignac number, because 21010012212201 - 2⁷ = 21010012212073 is a prime.

It is a super-2 number, since 2×21010012212201² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21010012212271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53417580 + ... + 53809458.

It is an arithmetic number, because the mean of its divisors is an integer number (1752814579800).

Almost surely, 2^{21010012212201} is an apocalyptic number.

It is an amenable number.

21010012212201 is a deficient number, since it is larger than the sum of its proper divisors (7035021064599).

21010012212201 is a wasteful number, since it uses less digits than its factorization.

21010012212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412048.

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

Adding to 21010012212201 its reverse (10221221001012), we get a palindrome (31231233213213).

The spelling of 21010012212201 in words is "twenty-one trillion, ten billion, twelve million, two hundred twelve thousand, two hundred one".