212223121031 has 4 divisors (see below), whose sum is σ = 223392759000. Its totient is φ = 201053483064.

The previous prime is 212223121027. The next prime is 212223121081. The reversal of 212223121031 is 130121322212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212223121031 - 2² = 212223121027 is a prime.

It is a super-2 number, since 2×212223121031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212223120994 and 212223121012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212223121001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5584818956 + ... + 5584818993.

It is an arithmetic number, because the mean of its divisors is an integer number (55848189750).

Almost surely, 2^212223121031 is an apocalyptic number.

212223121031 is a deficient number, since it is larger than the sum of its proper divisors (11169637969).

212223121031 is a wasteful number, since it uses less digits than its factorization.

212223121031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11169637968.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212223121031 its reverse (130121322212), we get a palindrome (342344443243).

The spelling of 212223121031 in words is "two hundred twelve billion, two hundred twenty-three million, one hundred twenty-one thousand, thirty-one".