222012212121 has 32 divisors (see below), whose sum is σ = 382055904000. Its totient is φ = 124784375040.

The previous prime is 222012212117. The next prime is 222012212129. The reversal of 222012212121 is 121212210222.

It is a happy number.

It is not a de Polignac number, because 222012212121 - 2² = 222012212117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222012212094 and 222012212103.

It is not an unprimeable number, because it can be changed into a prime (222012212129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9616896 + ... + 9639953.

It is an arithmetic number, because the mean of its divisors is an integer number (11939247000).

Almost surely, 2^222012212121 is an apocalyptic number.

222012212121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

222012212121 is a deficient number, since it is larger than the sum of its proper divisors (160043691879).

222012212121 is a wasteful number, since it uses less digits than its factorization.

222012212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19256926 (or 19256920 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 222012212121 its reverse (121212210222), we get a palindrome (343224422343).

It can be divided in two parts, 22201 and 2212121, that added together give a palindrome (2234322).

The spelling of 222012212121 in words is "two hundred twenty-two billion, twelve million, two hundred twelve thousand, one hundred twenty-one".