212111097 has 16 divisors (see below), whose sum is σ = 308940480. Its totient is φ = 128379200.

The previous prime is 212111087. The next prime is 212111099. The reversal of 212111097 is 790111212.

It is a cyclic number.

It is not a de Polignac number, because 212111097 - 2⁶ = 212111033 is a prime.

It is a super-2 number, since 2×212111097² = 89982234941086818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212111099) 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, 23179 + ... + 31007.

It is an arithmetic number, because the mean of its divisors is an integer number (19308780).

Almost surely, 2^212111097 is an apocalyptic number.

It is an amenable number.

212111097 is a deficient number, since it is larger than the sum of its proper divisors (96829383).

212111097 is a wasteful number, since it uses less digits than its factorization.

212111097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8664.

The product of its (nonzero) digits is 252, while the sum is 24.

The square root of 212111097 is about 14564.0343655184. The cubic root of 212111097 is about 596.3773350747.

The spelling of 212111097 in words is "two hundred twelve million, one hundred eleven thousand, ninety-seven".