1220134311 has 24 divisors (see below), whose sum is σ = 1974604944. Its totient is φ = 719487360.

The previous prime is 1220134273. The next prime is 1220134373. The reversal of 1220134311 is 1134310221.

1220134311 is a `hidden beast` number, since 1 + 220 + 13 + 431 + 1 = 666.

It is not a de Polignac number, because 1220134311 - 2²¹ = 1218037159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220133311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162886 + ... + 170211.

It is an arithmetic number, because the mean of its divisors is an integer number (82275206).

Almost surely, 2^1220134311 is an apocalyptic number.

1220134311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1220134311 is a deficient number, since it is larger than the sum of its proper divisors (754470633).

1220134311 is a wasteful number, since it uses less digits than its factorization.

1220134311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333151 (or 333148 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1220134311 is about 34930.4209966041. The cubic root of 1220134311 is about 1068.5689405397.

Adding to 1220134311 its reverse (1134310221), we get a palindrome (2354444532).

It can be divided in two parts, 1220 and 134311, that added together give a palindrome (135531).

The spelling of 1220134311 in words is "one billion, two hundred twenty million, one hundred thirty-four thousand, three hundred eleven".