101021120001 has 20 divisors (see below), whose sum is σ = 150926733012. Its totient is φ = 67339094688.

The previous prime is 101021119999. The next prime is 101021120041. The reversal of 101021120001 is 100021120101.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24704294976 + 76316825025 = 157176^2 + 276255^2 .

It is not a de Polignac number, because 101021120001 - 2¹ = 101021119999 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 (101021120041) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 621675 + ... + 767151.

Almost surely, 2^101021120001 is an apocalyptic number.

It is an amenable number.

101021120001 is a deficient number, since it is larger than the sum of its proper divisors (49905613011).

101021120001 is an equidigital number, since it uses as much as digits as its factorization.

101021120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154062 (or 154053 counting only the distinct ones).

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

Adding to 101021120001 its reverse (100021120101), we get a palindrome (201042240102).

The spelling of 101021120001 in words is "one hundred one billion, twenty-one million, one hundred twenty thousand, one".