1213203101 has 8 divisors (see below), whose sum is σ = 1359264864. Its totient is φ = 1073103120.

The previous prime is 1213203091. The next prime is 1213203119. The reversal of 1213203101 is 1013023121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213203101 - 2¹⁰ = 1213202077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213203191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1490015 + ... + 1490828.

It is an arithmetic number, because the mean of its divisors is an integer number (169908108).

Almost surely, 2^1213203101 is an apocalyptic number.

1213203101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1213203101 is a deficient number, since it is larger than the sum of its proper divisors (146061763).

1213203101 is a wasteful number, since it uses less digits than its factorization.

1213203101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2980891.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1213203101 is about 34831.0651717687. The cubic root of 1213203101 is about 1066.5416924654.

Adding to 1213203101 its reverse (1013023121), we get a palindrome (2226226222).

It can be divided in two parts, 121320 and 3101, that added together give a palindrome (124421).

The spelling of 1213203101 in words is "one billion, two hundred thirteen million, two hundred three thousand, one hundred one".