1220402112342 has 24 divisors (see below), whose sum is σ = 2839302874296. Its totient is φ = 348686317728.

The previous prime is 1220402112313. The next prime is 1220402112359. The reversal of 1220402112342 is 2432112040221.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2075513503 + ... + 2075514090.

It is an arithmetic number, because the mean of its divisors is an integer number (118304286429).

Almost surely, 2^{1220402112342} is an apocalyptic number.

1220402112342 is an abundant number, since it is smaller than the sum of its proper divisors (1618900761954).

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

1220402112342 is a wasteful number, since it uses less digits than its factorization.

1220402112342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4151027612 (or 4151027605 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 1220402112342 its reverse (2432112040221), we get a palindrome (3652514152563).

The spelling of 1220402112342 in words is "one trillion, two hundred twenty billion, four hundred two million, one hundred twelve thousand, three hundred forty-two".