1211273030 has 32 divisors (see below), whose sum is σ = 2408624640. Its totient is φ = 434884320.

The previous prime is 1211273003. The next prime is 1211273051. The reversal of 1211273030 is 303721121.

It is a junction number, because it is equal to n+sod(n) for n = 1211272993 and 1211273011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61004 + ... + 78383.

It is an arithmetic number, because the mean of its divisors is an integer number (75269520).

Almost surely, 2^1211273030 is an apocalyptic number.

1211273030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211273030 is a deficient number, since it is larger than the sum of its proper divisors (1197351610).

1211273030 is a wasteful number, since it uses less digits than its factorization.

1211273030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139484.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 1211273030 is about 34803.3479711363. The cubic root of 1211273030 is about 1065.9758092618.

Adding to 1211273030 its reverse (303721121), we get a palindrome (1514994151).

The spelling of 1211273030 in words is "one billion, two hundred eleven million, two hundred seventy-three thousand, thirty".