201012021022121 has 16 divisors (see below), whose sum is σ = 213955787750400. Its totient is φ = 188192694731520.

The previous prime is 201012021022117. The next prime is 201012021022133. The reversal of 201012021022121 is 121220120210102.

It is a cyclic number.

It is not a de Polignac number, because 201012021022121 - 2² = 201012021022117 is a prime.

It is a super-2 number, since 2×201012021022121² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201012021022121.

It is not an unprimeable number, because it can be changed into a prime (201012021028121) 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, 136613075 + ... + 138076631.

It is an arithmetic number, because the mean of its divisors is an integer number (13372236734400).

Almost surely, 2^{201012021022121} is an apocalyptic number.

It is an amenable number.

201012021022121 is a deficient number, since it is larger than the sum of its proper divisors (12943766728279).

201012021022121 is a wasteful number, since it uses less digits than its factorization.

201012021022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506064.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201012021022121 its reverse (121220120210102), we get a palindrome (322232141232223).

The spelling of 201012021022121 in words is "two hundred one trillion, twelve billion, twenty-one million, twenty-two thousand, one hundred twenty-one".