1201012101 has 24 divisors (see below), whose sum is σ = 1746800640. Its totient is φ = 795156000.

The previous prime is 1201012093. The next prime is 1201012181. The reversal of 1201012101 is 1012101021.

It is a happy number.

It is not a de Polignac number, because 1201012101 - 2³ = 1201012093 is a prime.

It is a super-3 number, since 3×1201012101³ (a number of 28 digits) contains 333 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201012181) 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, 1042876 + ... + 1044026.

It is an arithmetic number, because the mean of its divisors is an integer number (72783360).

Almost surely, 2^1201012101 is an apocalyptic number.

It is an amenable number.

1201012101 is a deficient number, since it is larger than the sum of its proper divisors (545788539).

1201012101 is a wasteful number, since it uses less digits than its factorization.

1201012101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857 (or 1854 counting only the distinct ones).

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

The square root of 1201012101 is about 34655.6214920466. The cubic root of 1201012101 is about 1062.9572401748.

Adding to 1201012101 its reverse (1012101021), we get a palindrome (2213113122).

The spelling of 1201012101 in words is "one billion, two hundred one million, twelve thousand, one hundred one".