210212011012221 has 12 divisors (see below), whose sum is σ = 311846046366972. Its totient is φ = 136353736872576.

The previous prime is 210212011012219. The next prime is 210212011012229. The reversal of 210212011012221 is 122210110212012.

210212011012221 is a `hidden beast` number, since 210 + 2 + 120 + 110 + 1 + 2 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 131467436105625 + 78744574906596 = 11465925^2 + 8873814^2 .

It is not a de Polignac number, because 210212011012221 - 2¹ = 210212011012219 is a prime.

It is a super-2 number, since 2×210212011012221² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210212011012194 and 210212011012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210212011012229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 315633649836 + ... + 315633650501.

It is an arithmetic number, because the mean of its divisors is an integer number (25987170530581).

Almost surely, 2^{210212011012221} is an apocalyptic number.

It is an amenable number.

210212011012221 is a deficient number, since it is larger than the sum of its proper divisors (101634035354751).

210212011012221 is a wasteful number, since it uses less digits than its factorization.

210212011012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631267300380 (or 631267300377 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 210212011012221 its reverse (122210110212012), we get a palindrome (332422121224233).

The spelling of 210212011012221 in words is "two hundred ten trillion, two hundred twelve billion, eleven million, twelve thousand, two hundred twenty-one".