222421012 has 12 divisors (see below), whose sum is σ = 424622016. Its totient is φ = 101100440.

The previous prime is 222420977. The next prime is 222421021. The reversal of 222421012 is 210124222.

It is a super-2 number, since 2×222421012² = 98942213158208288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2527468 + ... + 2527555.

It is an arithmetic number, because the mean of its divisors is an integer number (35385168).

Almost surely, 2^222421012 is an apocalyptic number.

222421012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

222421012 is a deficient number, since it is larger than the sum of its proper divisors (202201004).

222421012 is a wasteful number, since it uses less digits than its factorization.

222421012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5055038 (or 5055036 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 222421012 is about 14913.7859713756. The cubic root of 222421012 is about 605.8874229477.

Adding to 222421012 its reverse (210124222), we get a palindrome (432545234).

It can be divided in two parts, 2224210 and 12, that added together give a palindrome (2224222).

The spelling of 222421012 in words is "two hundred twenty-two million, four hundred twenty-one thousand, twelve".