1220142423511 has 8 divisors (see below), whose sum is σ = 1337821136784. Its totient is φ = 1103589822720.

The previous prime is 1220142423463. The next prime is 1220142423523. The reversal of 1220142423511 is 1153242410221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220142423511 - 2²⁷ = 1220008205783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220142423511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220142423571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281525850 + ... + 281530183.

It is an arithmetic number, because the mean of its divisors is an integer number (167227642098).

Almost surely, 2^{1220142423511} is an apocalyptic number.

1220142423511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220142423511 is a deficient number, since it is larger than the sum of its proper divisors (117678713273).

1220142423511 is a wasteful number, since it uses less digits than its factorization.

1220142423511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563056241.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 1220142423511 its reverse (1153242410221), we get a palindrome (2373384833732).

The spelling of 1220142423511 in words is "one trillion, two hundred twenty billion, one hundred forty-two million, four hundred twenty-three thousand, five hundred eleven".