84621131001 has 28 divisors (see below), whose sum is σ = 138407639280. Its totient is φ = 51285529080.

The previous prime is 84621130973. The next prime is 84621131011. The reversal of 84621131001 is 10013112648.

It is a happy number.

84621131001 is a `hidden beast` number, since 8 + 4 + 621 + 1 + 31 + 0 + 0 + 1 = 666.

It is not a de Polignac number, because 84621131001 - 2⁵ = 84621130969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84621131011) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5268271 + ... + 5284308.

Almost surely, 2^84621131001 is an apocalyptic number.

84621131001 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

84621131001 is a deficient number, since it is larger than the sum of its proper divisors (53786508279).

84621131001 is a wasteful number, since it uses less digits than its factorization.

84621131001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10552608 (or 10552593 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

Adding to 84621131001 its reverse (10013112648), we get a palindrome (94634243649).

The spelling of 84621131001 in words is "eighty-four billion, six hundred twenty-one million, one hundred thirty-one thousand, one".