1212201111222 has 24 divisors (see below), whose sum is σ = 2717002491840. Its totient is φ = 390133690800.

The previous prime is 1212201111217. The next prime is 1212201111239. The reversal of 1212201111222 is 2221111022121.

It is a super-2 number, since 2×1212201111222² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1212201111195 and 1212201111204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1161111654 + ... + 1161112697.

It is an arithmetic number, because the mean of its divisors is an integer number (113208437160).

Almost surely, 2^{1212201111222} is an apocalyptic number.

1212201111222 is an abundant number, since it is smaller than the sum of its proper divisors (1504801380618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212201111222 is a wasteful number, since it uses less digits than its factorization.

1212201111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2322224388 (or 2322224385 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1212201111222 its reverse (2221111022121), we get a palindrome (3433312133343).

The spelling of 1212201111222 in words is "one trillion, two hundred twelve billion, two hundred one million, one hundred eleven thousand, two hundred twenty-two".