212134221201 has 16 divisors (see below), whose sum is σ = 323263188864. Its totient is φ = 121215414144.

The previous prime is 212134221193. The next prime is 212134221227. The reversal of 212134221201 is 102122431212.

It is a happy number.

It is not a de Polignac number, because 212134221201 - 2³ = 212134221193 is a prime.

It is a super-3 number, since 3×212134221201³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (212134221241) 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, 521851 + ... + 834623.

It is an arithmetic number, because the mean of its divisors is an integer number (20203949304).

Almost surely, 2^212134221201 is an apocalyptic number.

212134221201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212134221201 is a deficient number, since it is larger than the sum of its proper divisors (111128967663).

212134221201 is a wasteful number, since it uses less digits than its factorization.

212134221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345080.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 212134221201 its reverse (102122431212), we get a palindrome (314256652413).

The spelling of 212134221201 in words is "two hundred twelve billion, one hundred thirty-four million, two hundred twenty-one thousand, two hundred one".