1011213101 has 4 divisors (see below), whose sum is σ = 1055178912. Its totient is φ = 967247292.

The previous prime is 1011213097. The next prime is 1011213107. The reversal of 1011213101 is 1013121101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1013121101 = 109 ⋅9294689.

It is a cyclic number.

It is not a de Polignac number, because 1011213101 - 2² = 1011213097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011213107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21982871 + ... + 21982916.

It is an arithmetic number, because the mean of its divisors is an integer number (263794728).

Almost surely, 2^1011213101 is an apocalyptic number.

It is an amenable number.

1011213101 is a deficient number, since it is larger than the sum of its proper divisors (43965811).

1011213101 is an equidigital number, since it uses as much as digits as its factorization.

1011213101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43965810.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1011213101 is about 31799.5770569358. The cubic root of 1011213101 is about 1003.7238163129.

Adding to 1011213101 its reverse (1013121101), we get a palindrome (2024334202).

The spelling of 1011213101 in words is "one billion, eleven million, two hundred thirteen thousand, one hundred one".