101021001201 has 16 divisors (see below), whose sum is σ = 149666068800. Its totient is φ = 67344937344.

The previous prime is 101021001139. The next prime is 101021001209. The reversal of 101021001201 is 102100120101.

It is a happy number.

It is not a de Polignac number, because 101021001201 - 2²² = 101016806897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (101021001209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1041370 + ... + 1134236.

It is an arithmetic number, because the mean of its divisors is an integer number (9354129300).

Almost surely, 2^101021001201 is an apocalyptic number.

It is an amenable number.

101021001201 is a deficient number, since it is larger than the sum of its proper divisors (48645067599).

101021001201 is an equidigital number, since it uses as much as digits as its factorization.

101021001201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133165 (or 133159 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 101021001201 its reverse (102100120101), we get a palindrome (203121121302).

The spelling of 101021001201 in words is "one hundred one billion, twenty-one million, one thousand, two hundred one".