1212212220202 has 16 divisors (see below), whose sum is σ = 1857567968640. Its totient is φ = 593030703168.

The previous prime is 1212212220133. The next prime is 1212212220203. The reversal of 1212212220202 is 2020222122121.

It is a self number, because there is not a number n which added to its sum of digits gives 1212212220202.

It is not an unprimeable number, because it can be changed into a prime (1212212220203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1638927 + ... + 2260642.

It is an arithmetic number, because the mean of its divisors is an integer number (116097998040).

Almost surely, 2^{1212212220202} is an apocalyptic number.

1212212220202 is a deficient number, since it is larger than the sum of its proper divisors (645355748438).

1212212220202 is a wasteful number, since it uses less digits than its factorization.

1212212220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3902925.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1212212220202 its reverse (2020222122121), we get a palindrome (3232434342323).

The spelling of 1212212220202 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred twenty thousand, two hundred two".