1220217542140 has 24 divisors (see below), whose sum is σ = 2562606480672. Its totient is φ = 488058513600.

The previous prime is 1220217542069. The next prime is 1220217542153. The reversal of 1220217542140 is 412457120221.

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 7 ways as a sum of consecutive naturals, for example, 1428711 + ... + 2116990.

It is an arithmetic number, because the mean of its divisors is an integer number (106775270028).

Almost surely, 2^{1220217542140} is an apocalyptic number.

1220217542140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220217542140 is an abundant number, since it is smaller than the sum of its proper divisors (1342388938532).

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

1220217542140 is a wasteful number, since it uses less digits than its factorization.

1220217542140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562917 (or 3562915 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The spelling of 1220217542140 in words is "one trillion, two hundred twenty billion, two hundred seventeen million, five hundred forty-two thousand, one hundred forty".