222121031 has 24 divisors (see below), whose sum is σ = 261826992. Its totient is φ = 187616000.

The previous prime is 222121021. The next prime is 222121033. The reversal of 222121031 is 130121222.

It is a happy number.

It is not a de Polignac number, because 222121031 - 2²² = 217926727 is a prime.

It is a super-2 number, since 2×222121031² = 98675504825005922, 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 = 222120997 and 222121015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 170081 + ... + 171381.

It is an arithmetic number, because the mean of its divisors is an integer number (10909458).

Almost surely, 2^222121031 is an apocalyptic number.

222121031 is a deficient number, since it is larger than the sum of its proper divisors (39705961).

222121031 is a wasteful number, since it uses less digits than its factorization.

222121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423 (or 1412 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 222121031 is about 14903.7254067565. The cubic root of 222121031 is about 605.6149119920.

Adding to 222121031 its reverse (130121222), we get a palindrome (352242253).

The spelling of 222121031 in words is "two hundred twenty-two million, one hundred twenty-one thousand, thirty-one".