212401621273 has 16 divisors (see below), whose sum is σ = 220169664000. Its totient is φ = 204663625600.

The previous prime is 212401621259. The next prime is 212401621291. The reversal of 212401621273 is 372126104212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-212401621273 is a prime.

It is a super-2 number, since 2×212401621273² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212401621213) 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, 36311253 + ... + 36317101.

It is an arithmetic number, because the mean of its divisors is an integer number (13760604000).

Almost surely, 2^212401621273 is an apocalyptic number.

It is an amenable number.

212401621273 is a deficient number, since it is larger than the sum of its proper divisors (7768042727).

212401621273 is a wasteful number, since it uses less digits than its factorization.

212401621273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8192.

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 212401621273 its reverse (372126104212), we get a palindrome (584527725485).

The spelling of 212401621273 in words is "two hundred twelve billion, four hundred one million, six hundred twenty-one thousand, two hundred seventy-three".