211217621270 has 16 divisors (see below), whose sum is σ = 385866222768. Its totient is φ = 83226047520.

The previous prime is 211217621249. The next prime is 211217621273. The reversal of 211217621270 is 72126712112.

It is a super-2 number, since 2×211217621270² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211217621273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157624421 + ... + 157625760.

It is an arithmetic number, because the mean of its divisors is an integer number (24116638923).

Almost surely, 2^211217621270 is an apocalyptic number.

211217621270 is a deficient number, since it is larger than the sum of its proper divisors (174648601498).

211217621270 is a wasteful number, since it uses less digits than its factorization.

211217621270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315250255.

The product of its (nonzero) digits is 4704, while the sum is 32.

The spelling of 211217621270 in words is "two hundred eleven billion, two hundred seventeen million, six hundred twenty-one thousand, two hundred seventy".