211020021210121 has 16 divisors (see below), whose sum is σ = 217915491156480. Its totient is φ = 204130085564160.

The previous prime is 211020021210113. The next prime is 211020021210151. The reversal of 211020021210121 is 121012120020112.

It is a cyclic number.

It is not a de Polignac number, because 211020021210121 - 2³ = 211020021210113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211020021210095 and 211020021210104.

It is not an unprimeable number, because it can be changed into a prime (211020021210151) 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, 1260392011 + ... + 1260559423.

It is an arithmetic number, because the mean of its divisors is an integer number (13619718197280).

Almost surely, 2^{211020021210121} is an apocalyptic number.

It is an amenable number.

211020021210121 is a deficient number, since it is larger than the sum of its proper divisors (6895469946359).

211020021210121 is a wasteful number, since it uses less digits than its factorization.

211020021210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183696.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211020021210121 its reverse (121012120020112), we get a palindrome (332032141230233).

The spelling of 211020021210121 in words is "two hundred eleven trillion, twenty billion, twenty-one million, two hundred ten thousand, one hundred twenty-one".