211106167221172 has 6 divisors (see below), whose sum is σ = 369435792637058. Its totient is φ = 105553083610584.

The previous prime is 211106167221139. The next prime is 211106167221179. The reversal of 211106167221172 is 271122761601112.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 193542742337296 + 17563424883876 = 13911964^2 + 4190874^2 .

It is a super-4 number, since 4×211106167221172⁴ (a number of 58 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211106167221179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26388270902643 + ... + 26388270902650.

Almost surely, 2^{211106167221172} is an apocalyptic number.

It is an amenable number.

211106167221172 is a deficient number, since it is larger than the sum of its proper divisors (158329625415886).

211106167221172 is a wasteful number, since it uses less digits than its factorization.

211106167221172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52776541805297 (or 52776541805295 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 40.

The spelling of 211106167221172 in words is "two hundred eleven trillion, one hundred six billion, one hundred sixty-seven million, two hundred twenty-one thousand, one hundred seventy-two".