212021031 has 8 divisors (see below), whose sum is σ = 286914304. Its totient is φ = 139237560.

The previous prime is 212021027. The next prime is 212021083. The reversal of 212021031 is 130120212.

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

It is not a de Polignac number, because 212021031 - 2² = 212021027 is a prime.

It is a super-2 number, since 2×212021031² = 89905835172605922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212020998 and 212021016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021021) 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, 527215 + ... + 527616.

It is an arithmetic number, because the mean of its divisors is an integer number (35864288).

Almost surely, 2^212021031 is an apocalyptic number.

212021031 is a deficient number, since it is larger than the sum of its proper divisors (74893273).

212021031 is a wasteful number, since it uses less digits than its factorization.

212021031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054901.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 212021031 is about 14560.9419681558. The cubic root of 212021031 is about 596.2929124519.

Adding to 212021031 its reverse (130120212), we get a palindrome (342141243).

The spelling of 212021031 in words is "two hundred twelve million, twenty-one thousand, thirty-one".