201020012212121 has 8 divisors (see below), whose sum is σ = 213005114254080. Its totient is φ = 189052731885888.

The previous prime is 201020012212081. The next prime is 201020012212139. The reversal of 201020012212121 is 121212210020102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-201020012212121 is a prime.

It is a super-2 number, since 2×201020012212121² (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 201020012212121.

It is not an unprimeable number, because it can be changed into a prime (201020012112121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4455405701 + ... + 4455450818.

It is an arithmetic number, because the mean of its divisors is an integer number (26625639281760).

Almost surely, 2^{201020012212121} is an apocalyptic number.

It is an amenable number.

201020012212121 is a deficient number, since it is larger than the sum of its proper divisors (11985102041959).

201020012212121 is a wasteful number, since it uses less digits than its factorization.

201020012212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8910857863.

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

Adding to 201020012212121 its reverse (121212210020102), we get a palindrome (322232222232223).

The spelling of 201020012212121 in words is "two hundred one trillion, twenty billion, twelve million, two hundred twelve thousand, one hundred twenty-one".