211121031 has 8 divisors (see below), whose sum is σ = 307085184. Its totient is φ = 127952120.

The previous prime is 211121021. The next prime is 211121047. The reversal of 211121031 is 130121112.

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 211121031 - 2⁵ = 211120999 is a prime.

It is a super-2 number, since 2×211121031² = 89144179461005922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211120998 and 211121016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121021) 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, 3198771 + ... + 3198836.

It is an arithmetic number, because the mean of its divisors is an integer number (38385648).

Almost surely, 2^211121031 is an apocalyptic number.

211121031 is a deficient number, since it is larger than the sum of its proper divisors (95964153).

211121031 is a wasteful number, since it uses less digits than its factorization.

211121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6397621.

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

The square root of 211121031 is about 14530.0045079140. The cubic root of 211121031 is about 595.4479887686.

Adding to 211121031 its reverse (130121112), we get a palindrome (341242143).

The spelling of 211121031 in words is "two hundred eleven million, one hundred twenty-one thousand, thirty-one".