211217196372 has 144 divisors (see below), whose sum is σ = 644248305792. Its totient is φ = 53283605760.

The previous prime is 211217196361. The next prime is 211217196373. The reversal of 211217196372 is 273691712112.

It is a super-2 number, since 2×211217196372² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211217196373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 424879 + ... + 776502.

It is an arithmetic number, because the mean of its divisors is an integer number (4473946568).

Almost surely, 2^211217196372 is an apocalyptic number.

It is an amenable number.

211217196372 is an abundant number, since it is smaller than the sum of its proper divisors (433031109420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211217196372 is a wasteful number, since it uses less digits than its factorization.

211217196372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201438 (or 1201429 counting only the distinct ones).

The product of its digits is 63504, while the sum is 42.

The spelling of 211217196372 in words is "two hundred eleven billion, two hundred seventeen million, one hundred ninety-six thousand, three hundred seventy-two".