1220510155411 has 4 divisors (see below), whose sum is σ = 1221543611424. Its totient is φ = 1219476699400.

The previous prime is 1220510155393. The next prime is 1220510155421. The reversal of 1220510155411 is 1145510150221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220510155411 - 2⁵ = 1220510155379 is a prime.

It is a super-2 number, since 2×1220510155411² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220510155411.

It is not an unprimeable number, because it can be changed into a prime (1220510155421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 516726235 + ... + 516728596.

It is an arithmetic number, because the mean of its divisors is an integer number (305385902856).

Almost surely, 2^{1220510155411} is an apocalyptic number.

1220510155411 is a deficient number, since it is larger than the sum of its proper divisors (1033456013).

1220510155411 is a wasteful number, since it uses less digits than its factorization.

1220510155411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033456012.

The product of its (nonzero) digits is 2000, while the sum is 28.

The spelling of 1220510155411 in words is "one trillion, two hundred twenty billion, five hundred ten million, one hundred fifty-five thousand, four hundred eleven".