202120201021211 has 8 divisors (see below), whose sum is σ = 233465045030064. Its totient is φ = 172937070392320.

The previous prime is 202120201021199. The next prime is 202120201021259. The reversal of 202120201021211 is 112120102021202.

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

It is a cyclic number.

It is not a de Polignac number, because 202120201021211 - 2³⁴ = 202103021152027 is a prime.

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 202120201021211.

It is not an unprimeable number, because it can be changed into a prime (202120201023211) 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, 540428344790 + ... + 540428345163.

It is an arithmetic number, because the mean of its divisors is an integer number (29183130628758).

Almost surely, 2^{202120201021211} is an apocalyptic number.

202120201021211 is a deficient number, since it is larger than the sum of its proper divisors (31344844008853).

202120201021211 is a wasteful number, since it uses less digits than its factorization.

202120201021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080856689981.

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

Adding to 202120201021211 its reverse (112120102021202), we get a palindrome (314240303042413).

Subtracting from 202120201021211 its reverse (112120102021202), we obtain a palindrome (90000099000009).

The spelling of 202120201021211 in words is "two hundred two trillion, one hundred twenty billion, two hundred one million, twenty-one thousand, two hundred eleven".