210121022101 has 16 divisors (see below), whose sum is σ = 211911810880. Its totient is φ = 208339879680.

The previous prime is 210121022093. The next prime is 210121022113. The reversal of 210121022101 is 101220121012.

It is a cyclic number.

It is not a de Polignac number, because 210121022101 - 2³ = 210121022093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121022201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66429346 + ... + 66432508.

It is an arithmetic number, because the mean of its divisors is an integer number (13244488180).

Almost surely, 2^210121022101 is an apocalyptic number.

It is an amenable number.

210121022101 is a deficient number, since it is larger than the sum of its proper divisors (1790788779).

210121022101 is a wasteful number, since it uses less digits than its factorization.

210121022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4516.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210121022101 its reverse (101220121012), we get a palindrome (311341143113).

The spelling of 210121022101 in words is "two hundred ten billion, one hundred twenty-one million, twenty-two thousand, one hundred one".