212111031 has 8 divisors (see below), whose sum is σ = 308525184. Its totient is φ = 128552120.

The previous prime is 212111027. The next prime is 212111033. The reversal of 212111031 is 130111212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212111031 - 2² = 212111027 is a prime.

It is a super-2 number, since 2×212111031² = 89982178943765922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212110998 and 212111016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111033) 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, 3213771 + ... + 3213836.

It is an arithmetic number, because the mean of its divisors is an integer number (38565648).

Almost surely, 2^212111031 is an apocalyptic number.

212111031 is a deficient number, since it is larger than the sum of its proper divisors (96414153).

212111031 is a wasteful number, since it uses less digits than its factorization.

212111031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6427621.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 212111031 is about 14564.0320996625. The cubic root of 212111031 is about 596.3772732189.

Adding to 212111031 its reverse (130111212), we get a palindrome (342222243).

The spelling of 212111031 in words is "two hundred twelve million, one hundred eleven thousand, thirty-one".