1212012021222 has 192 divisors, whose sum is σ = 2725122216960. Its totient is φ = 389188800000.

The previous prime is 1212012021221. The next prime is 1212012021257. The reversal of 1212012021222 is 2221202102121.

It is a happy number.

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 = 1212012021195 and 1212012021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212012021221) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4472368947 + ... + 4472369217.

It is an arithmetic number, because the mean of its divisors is an integer number (14193344880).

Almost surely, 2^{1212012021222} is an apocalyptic number.

1212012021222 is an abundant number, since it is smaller than the sum of its proper divisors (1513110195738).

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

1212012021222 is a wasteful number, since it uses less digits than its factorization.

1212012021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811 (or 808 counting only the distinct ones).

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

Adding to 1212012021222 its reverse (2221202102121), we get a palindrome (3433214123343).

The spelling of 1212012021222 in words is "one trillion, two hundred twelve billion, twelve million, twenty-one thousand, two hundred twenty-two".