1213012101 has 48 divisors (see below), whose sum is σ = 2040837120. Its totient is φ = 636410880.

The previous prime is 1213012091. The next prime is 1213012103. The reversal of 1213012101 is 1012103121.

It is not a de Polignac number, because 1213012101 - 2⁶ = 1213012037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213012103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 96540 + ... + 108378.

It is an arithmetic number, because the mean of its divisors is an integer number (42517440).

Almost surely, 2^1213012101 is an apocalyptic number.

It is an amenable number.

1213012101 is a deficient number, since it is larger than the sum of its proper divisors (827825019).

1213012101 is a wasteful number, since it uses less digits than its factorization.

1213012101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11914 (or 11907 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1213012101 is about 34828.3232585205. The cubic root of 1213012101 is about 1066.4857193821.

Adding to 1213012101 its reverse (1012103121), we get a palindrome (2225115222).

The spelling of 1213012101 in words is "one billion, two hundred thirteen million, twelve thousand, one hundred one".