1220021002122 has 32 divisors (see below), whose sum is σ = 2627781464448. Its totient is φ = 375384803136.

The previous prime is 1220021002121. The next prime is 1220021002147. The reversal of 1220021002122 is 2212001200221.

It is not an unprimeable number, because it can be changed into a prime (1220021002121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7145683 + ... + 7314425.

It is an arithmetic number, because the mean of its divisors is an integer number (82118170764).

Almost surely, 2^{1220021002122} is an apocalyptic number.

1220021002122 is an abundant number, since it is smaller than the sum of its proper divisors (1407760462326).

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

1220021002122 is a wasteful number, since it uses less digits than its factorization.

1220021002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261454.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1220021002122 its reverse (2212001200221), we get a palindrome (3432022202343).

The spelling of 1220021002122 in words is "one trillion, two hundred twenty billion, twenty-one million, two thousand, one hundred twenty-two".