222121122002 has 16 divisors (see below), whose sum is σ = 358828212120. Its totient is φ = 102512535552.

The previous prime is 222121121977. The next prime is 222121122023. The reversal of 222121122002 is 200221121222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 219922543681 + 2198578321 = 468959^2 + 46889^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381074 + ... + 767762.

Almost surely, 2^222121122002 is an apocalyptic number.

222121122002 is a deficient number, since it is larger than the sum of its proper divisors (136707090118).

222121122002 is a wasteful number, since it uses less digits than its factorization.

222121122002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408797.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222121122002 its reverse (200221121222), we get a palindrome (422342243224).

The spelling of 222121122002 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-two thousand, two".