211472139321 has 9 divisors (see below), whose sum is σ = 305461749541. Its totient is φ = 140980506492.

The previous prime is 211472139313. The next prime is 211472139349. The reversal of 211472139321 is 123931274112.

The square root of 211472139321 is 459861.

It is a perfect power (a square), and thus also a powerful number.

211472139321 is a `hidden beast` number, since 2 + 114 + 7 + 213 + 9 + 321 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 211472139321 - 2³ = 211472139313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211472139121) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1302940 + ... + 1456226.

Almost surely, 2^211472139321 is an apocalyptic number.

211472139321 is the 459861-st square number.

211472139321 is the 229931-st centered octagonal number.

It is an amenable number.

211472139321 is a deficient number, since it is larger than the sum of its proper divisors (93989610220).

211472139321 is an frugal number, since it uses more digits than its factorization.

211472139321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306580 (or 153290 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

Multiplying 211472139321 by its sum of digits (36), we get a square (7612997015556 = 2759166²).

The spelling of 211472139321 in words is "two hundred eleven billion, four hundred seventy-two million, one hundred thirty-nine thousand, three hundred twenty-one".