210121022122306 has 4 divisors (see below), whose sum is σ = 315181533183462. Its totient is φ = 105060511061152.

The previous prime is 210121022122259. The next prime is 210121022122367. The reversal of 210121022122306 is 603221220121012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 141437288493081 + 68683733629225 = 11892741^2 + 8287565^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52530255530575 + ... + 52530255530578.

Almost surely, 2^{210121022122306} is an apocalyptic number.

210121022122306 is a deficient number, since it is larger than the sum of its proper divisors (105060511061156).

210121022122306 is a wasteful number, since it uses less digits than its factorization.

210121022122306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105060511061155.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 210121022122306 its reverse (603221220121012), we get a palindrome (813342242243318).

The spelling of 210121022122306 in words is "two hundred ten trillion, one hundred twenty-one billion, twenty-two million, one hundred twenty-two thousand, three hundred six".