210000212020121 has 16 divisors (see below), whose sum is σ = 212612267810880. Its totient is φ = 207390121463040.

The previous prime is 210000212020111. The next prime is 210000212020133. The reversal of 210000212020121 is 121020212000012.

It is a cyclic number.

It is not a de Polignac number, because 210000212020121 - 2²² = 210000207825817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210000212020096 and 210000212020105.

It is not an unprimeable number, because it can be changed into a prime (210000212020111) 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, 2774476445 + ... + 2774552133.

It is an arithmetic number, because the mean of its divisors is an integer number (13288266738180).

Almost surely, 2^{210000212020121} is an apocalyptic number.

It is an amenable number.

210000212020121 is a deficient number, since it is larger than the sum of its proper divisors (2612055790759).

210000212020121 is an equidigital number, since it uses as much as digits as its factorization.

210000212020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88216.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 210000212020121 its reverse (121020212000012), we get a palindrome (331020424020133).

The spelling of 210000212020121 in words is "two hundred ten trillion, two hundred twelve million, twenty thousand, one hundred twenty-one".