1131212101 has 8 divisors (see below), whose sum is σ = 1191451680. Its totient is φ = 1071042768.

The previous prime is 1131212083. The next prime is 1131212107. The reversal of 1131212101 is 1012121311.

It is a happy number.

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

It is not a de Polignac number, because 1131212101 - 2²⁵ = 1097657669 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 (1131212107) 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, 17295 + ... + 50611.

It is an arithmetic number, because the mean of its divisors is an integer number (148931460).

Almost surely, 2^1131212101 is an apocalyptic number.

It is an amenable number.

1131212101 is a deficient number, since it is larger than the sum of its proper divisors (60239579).

1131212101 is a wasteful number, since it uses less digits than its factorization.

1131212101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35123.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1131212101 is about 33633.4967108685. The cubic root of 1131212101 is about 1041.9527233092.

Adding to 1131212101 its reverse (1012121311), we get a palindrome (2143333412).

The spelling of 1131212101 in words is "one billion, one hundred thirty-one million, two hundred twelve thousand, one hundred one".