9911213401 has 8 divisors (see below), whose sum is σ = 10495227240. Its totient is φ = 9327310848.

The previous prime is 9911213399. The next prime is 9911213437. The reversal of 9911213401 is 1043121199.

It can be written as a sum of positive squares in 4 ways, for example, as 7726585801 + 2184627600 = 87901^2 + 46740^2 .

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

It is not a de Polignac number, because 9911213401 - 2¹ = 9911213399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9911213801) 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, 217345 + ... + 258961.

It is an arithmetic number, because the mean of its divisors is an integer number (1311903405).

Almost surely, 2^9911213401 is an apocalyptic number.

It is an amenable number.

9911213401 is a deficient number, since it is larger than the sum of its proper divisors (584013839).

9911213401 is a wasteful number, since it uses less digits than its factorization.

9911213401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55643.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 9911213401 is about 99555.0772236153. The cubic root of 9911213401 is about 2148.0395615018.

The spelling of 9911213401 in words is "nine billion, nine hundred eleven million, two hundred thirteen thousand, four hundred one".