212122222010001 has 20 divisors (see below), whose sum is σ = 320011302303924. Its totient is φ = 140014667988000.

The previous prime is 212122222009987. The next prime is 212122222010051. The reversal of 212122222010001 is 100010222221212.

It is a happy number.

212122222010001 is a `hidden beast` number, since 2 + 121 + 222 + 220 + 100 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 180961711744401 + 31160510265600 = 13452201^2 + 5582160^2 .

It is not a de Polignac number, because 212122222010001 - 2¹¹ = 212122222007953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212122222010051) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12964312930 + ... + 12964329291.

Almost surely, 2^{212122222010001} is an apocalyptic number.

It is an amenable number.

212122222010001 is a deficient number, since it is larger than the sum of its proper divisors (107889080293923).

212122222010001 is a wasteful number, since it uses less digits than its factorization.

212122222010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25928642334 (or 25928642325 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212122222010001 its reverse (100010222221212), we get a palindrome (312132444231213).

The spelling of 212122222010001 in words is "two hundred twelve trillion, one hundred twenty-two billion, two hundred twenty-two million, ten thousand, one".