1212211220222 has 32 divisors (see below), whose sum is σ = 2026706054400. Its totient is φ = 540402115968.

The previous prime is 1212211220197. The next prime is 1212211220251. The reversal of 1212211220222 is 2220221122121.

It is a super-2 number, since 2×1212211220222² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212211220194 and 1212211220203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19868279 + ... + 19929197.

It is an arithmetic number, because the mean of its divisors is an integer number (63334564200).

Almost surely, 2^{1212211220222} is an apocalyptic number.

1212211220222 is a deficient number, since it is larger than the sum of its proper divisors (814494834178).

1212211220222 is a wasteful number, since it uses less digits than its factorization.

1212211220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91760.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1212211220222 its reverse (2220221122121), we get a palindrome (3432432342343).

The spelling of 1212211220222 in words is "one trillion, two hundred twelve billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty-two".