1002121222122 has 24 divisors (see below), whose sum is σ = 2203669555776. Its totient is φ = 329054729256.

The previous prime is 1002121222117. The next prime is 1002121222133. The reversal of 1002121222122 is 2212221212001.

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 = 1002121222095 and 1002121222104.

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, 415471938 + ... + 415474349.

It is an arithmetic number, because the mean of its divisors is an integer number (91819564824).

Almost surely, 2^{1002121222122} is an apocalyptic number.

1002121222122 is an abundant number, since it is smaller than the sum of its proper divisors (1201548333654).

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

1002121222122 is a wasteful number, since it uses less digits than its factorization.

1002121222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830946362 (or 830946359 counting only the distinct ones).

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

Adding to 1002121222122 its reverse (2212221212001), we get a palindrome (3214342434123).

The spelling of 1002121222122 in words is "one trillion, two billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-two".