1213102101 has 32 divisors (see below), whose sum is σ = 1762928640. Its totient is φ = 739476864.

The previous prime is 1213102097. The next prime is 1213102157. The reversal of 1213102101 is 1012013121.

It is not a de Polignac number, because 1213102101 - 2² = 1213102097 is a prime.

It is a super-2 number, since 2×1213102101² = 2943233414901228402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213102801) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 192466 + ... + 198668.

It is an arithmetic number, because the mean of its divisors is an integer number (55091520).

Almost surely, 2^1213102101 is an apocalyptic number.

It is an amenable number.

1213102101 is a deficient number, since it is larger than the sum of its proper divisors (549826539).

1213102101 is a wasteful number, since it uses less digits than its factorization.

1213102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6345.

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

The square root of 1213102101 is about 34829.6152864197. The cubic root of 1213102101 is about 1066.5120948654.

Adding to 1213102101 its reverse (1012013121), we get a palindrome (2225115222).

The spelling of 1213102101 in words is "one billion, two hundred thirteen million, one hundred two thousand, one hundred one".