222120121222221 has 16 divisors (see below), whose sum is σ = 296987301601920. Its totient is φ = 147666516889280.

The previous prime is 222120121222213. The next prime is 222120121222229. The reversal of 222120121222221 is 122222121021222.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (222120121222213) and next prime (222120121222229).

It is a cyclic number.

It is not a de Polignac number, because 222120121222221 - 2³ = 222120121222213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222120121222191 and 222120121222200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222120121222229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162217711 + ... + 163581251.

It is an arithmetic number, because the mean of its divisors is an integer number (18561706350120).

Almost surely, 2^{222120121222221} is an apocalyptic number.

It is an amenable number.

222120121222221 is a deficient number, since it is larger than the sum of its proper divisors (74867180379699).

222120121222221 is a wasteful number, since it uses less digits than its factorization.

222120121222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515156.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 222120121222221 its reverse (122222121021222), we get a palindrome (344342242243443).

The spelling of 222120121222221 in words is "two hundred twenty-two trillion, one hundred twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".