210020210121 has 8 divisors (see below), whose sum is σ = 282799491264. Its totient is φ = 138627201200.

The previous prime is 210020210107. The next prime is 210020210137. The reversal of 210020210121 is 121012020012.

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 210020210121 - 2¹³ = 210020201929 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 210020210097 and 210020210106.

It is not an unprimeable number, because it can be changed into a prime (210030210121) 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, 346567701 + ... + 346568306.

It is an arithmetic number, because the mean of its divisors is an integer number (35349936408).

Almost surely, 2^210020210121 is an apocalyptic number.

It is an amenable number.

210020210121 is a deficient number, since it is larger than the sum of its proper divisors (72779281143).

210020210121 is a wasteful number, since it uses less digits than its factorization.

210020210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693136111.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210020210121 its reverse (121012020012), we get a palindrome (331032230133).

The spelling of 210020210121 in words is "two hundred ten billion, twenty million, two hundred ten thousand, one hundred twenty-one".