1212122222010 has 64 divisors (see below), whose sum is σ = 3694086777600. Its totient is φ = 277056507456.

The previous prime is 1212122221997. The next prime is 1212122222011. The reversal of 1212122222010 is 102222212121.

It is a happy number.

1212122222010 is a `hidden beast` number, since 1 + 212 + 1 + 222 + 220 + 10 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1212122222011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 320665365 + ... + 320669144.

It is an arithmetic number, because the mean of its divisors is an integer number (57720105900).

Almost surely, 2^{1212122222010} is an apocalyptic number.

1212122222010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212122222010 is an abundant number, since it is smaller than the sum of its proper divisors (2481964555590).

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

1212122222010 is a wasteful number, since it uses less digits than its factorization.

1212122222010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641334532 (or 641334526 counting only the distinct ones).

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

Adding to 1212122222010 its reverse (102222212121), we get a palindrome (1314344434131).

The spelling of 1212122222010 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, ten".