121001010201 has 36 divisors (see below), whose sum is σ = 187647076708. Its totient is φ = 75074548032.

The previous prime is 121001010187. The next prime is 121001010227. The reversal of 121001010201 is 102010100121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 49363952400 + 71637057801 = 222180^2 + 267651^2 .

It is not a de Polignac number, because 121001010201 - 2⁷ = 121001010073 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121001010001) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 167290 + ... + 519603.

Almost surely, 2^121001010201 is an apocalyptic number.

It is an amenable number.

121001010201 is a deficient number, since it is larger than the sum of its proper divisors (66646066507).

121001010201 is a wasteful number, since it uses less digits than its factorization.

121001010201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686982 (or 686956 counting only the distinct ones).

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

Adding to 121001010201 its reverse (102010100121), we get a palindrome (223011110322).

The spelling of 121001010201 in words is "one hundred twenty-one billion, one million, ten thousand, two hundred one".