1220021043342 has 16 divisors (see below), whose sum is σ = 2583573974352. Its totient is φ = 382751699840.

The previous prime is 1220021043341. The next prime is 1220021043377. The reversal of 1220021043342 is 2433401200221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220021043341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5980495209 + ... + 5980495412.

It is an arithmetic number, because the mean of its divisors is an integer number (161473373397).

Almost surely, 2^{1220021043342} is an apocalyptic number.

1220021043342 is an abundant number, since it is smaller than the sum of its proper divisors (1363552931010).

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

1220021043342 is a wasteful number, since it uses less digits than its factorization.

1220021043342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11960990643.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 1220021043342 its reverse (2433401200221), we get a palindrome (3653422243563).

The spelling of 1220021043342 in words is "one trillion, two hundred twenty billion, twenty-one million, forty-three thousand, three hundred forty-two".