1212220210122 has 24 divisors (see below), whose sum is σ = 2626503106500. Its totient is φ = 404069405760.

The previous prime is 1212220210073. The next prime is 1212220210151. The reversal of 1212220210122 is 2210120222121.

It is a happy number.

1212220210122 is a `hidden beast` number, since 1 + 212 + 220 + 210 + 1 + 22 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1138747228641 + 73472981481 = 1067121^2 + 271059^2 .

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 = 1212220210095 and 1212220210104.

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, 1965472 + ... + 2507492.

Almost surely, 2^{1212220210122} is an apocalyptic number.

1212220210122 is an abundant number, since it is smaller than the sum of its proper divisors (1414282896378).

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

1212220210122 is a wasteful number, since it uses less digits than its factorization.

1212220210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666278 (or 666275 counting only the distinct ones).

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

Adding to 1212220210122 its reverse (2210120222121), we get a palindrome (3422340432243).

The spelling of 1212220210122 in words is "one trillion, two hundred twelve billion, two hundred twenty million, two hundred ten thousand, one hundred twenty-two".