136801021 has 8 divisors (see below), whose sum is σ = 156432384. Its totient is φ = 117191760.

The previous prime is 136801013. The next prime is 136801037. The reversal of 136801021 is 120108631.

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

It is not a de Polignac number, because 136801021 - 2³ = 136801013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136800983 and 136801001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136801001) 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, 11076 + ... + 19906.

It is an arithmetic number, because the mean of its divisors is an integer number (19554048).

Almost surely, 2^136801021 is an apocalyptic number.

It is an amenable number.

136801021 is a deficient number, since it is larger than the sum of its proper divisors (19631363).

136801021 is an equidigital number, since it uses as much as digits as its factorization.

136801021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11051.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 136801021 is about 11696.1968605184. The cubic root of 136801021 is about 515.2639750170.

Adding to 136801021 its reverse (120108631), we get a palindrome (256909652).

The spelling of 136801021 in words is "one hundred thirty-six million, eight hundred one thousand, twenty-one".