1210012011 has 24 divisors (see below), whose sum is σ = 1908038496. Its totient is φ = 734417280.

The previous prime is 1210012007. The next prime is 1210012051. The reversal of 1210012011 is 1102100121.

It is a happy number.

It is not a de Polignac number, because 1210012011 - 2² = 1210012007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1210011984 and 1210012002.

It is not an unprimeable number, because it can be changed into a prime (1210012051) 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, 62295 + ... + 79376.

It is an arithmetic number, because the mean of its divisors is an integer number (79501604).

Almost surely, 2^1210012011 is an apocalyptic number.

1210012011 is a deficient number, since it is larger than the sum of its proper divisors (698026485).

1210012011 is a wasteful number, since it uses less digits than its factorization.

1210012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141763 (or 141760 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1210012011 is about 34785.2269074100. The cubic root of 1210012011 is about 1065.6057626361.

Adding to 1210012011 its reverse (1102100121), we get a palindrome (2312112132).

The spelling of 1210012011 in words is "one billion, two hundred ten million, twelve thousand, eleven".