11213151021 has 24 divisors (see below), whose sum is σ = 16447152384. Its totient is φ = 7359992640.

The previous prime is 11213150999. The next prime is 11213151031. The reversal of 11213151021 is 12015131211.

11213151021 is a `hidden beast` number, since 1 + 1 + 2 + 131 + 510 + 21 = 666.

It is not a de Polignac number, because 11213151021 - 2¹⁴ = 11213134637 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11213150985 and 11213151003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213151031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1558785 + ... + 1565961.

It is an arithmetic number, because the mean of its divisors is an integer number (685298016).

Almost surely, 2^11213151021 is an apocalyptic number.

It is an amenable number.

11213151021 is a deficient number, since it is larger than the sum of its proper divisors (5234001363).

11213151021 is a wasteful number, since it uses less digits than its factorization.

11213151021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9841 (or 9838 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

Adding to 11213151021 its reverse (12015131211), we get a palindrome (23228282232).

The spelling of 11213151021 in words is "eleven billion, two hundred thirteen million, one hundred fifty-one thousand, twenty-one".