201001121010 has 96 divisors (see below), whose sum is σ = 537530825520. Its totient is φ = 52073570304.

The previous prime is 201001120981. The next prime is 201001121017. The reversal of 201001121010 is 10121100102.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 129982601961 + 71018519049 = 360531^2 + 266493^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 201001120983 and 201001121001.

It is not an unprimeable number, because it can be changed into a prime (201001121017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2196246 + ... + 2285934.

Almost surely, 2^201001121010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201001121010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268765412760).

201001121010 is an abundant number, since it is smaller than the sum of its proper divisors (336529704510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201001121010 is a wasteful number, since it uses less digits than its factorization.

201001121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90412 (or 90409 counting only the distinct ones).

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

Adding to 201001121010 its reverse (10121100102), we get a palindrome (211122221112).

The spelling of 201001121010 in words is "two hundred one billion, one million, one hundred twenty-one thousand, ten".