201001220120121 has 16 divisors (see below), whose sum is σ = 272546411524800. Its totient is φ = 131728460802048.

The previous prime is 201001220120089. The next prime is 201001220120171. The reversal of 201001220120121 is 121021022100102.

It is not a de Polignac number, because 201001220120121 - 2⁵ = 201001220120089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201001220120121.

It is not an unprimeable number, because it can be changed into a prime (201001220120171) 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, 15561945 + ... + 25380633.

It is an arithmetic number, because the mean of its divisors is an integer number (17034150720300).

Almost surely, 2^{201001220120121} is an apocalyptic number.

It is an amenable number.

201001220120121 is a deficient number, since it is larger than the sum of its proper divisors (71545191404679).

201001220120121 is a wasteful number, since it uses less digits than its factorization.

201001220120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9934408.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201001220120121 its reverse (121021022100102), we get a palindrome (322022242220223).

The spelling of 201001220120121 in words is "two hundred one trillion, one billion, two hundred twenty million, one hundred twenty thousand, one hundred twenty-one".