210121202120101 has 8 divisors (see below), whose sum is σ = 210443990739840. Its totient is φ = 209798425441248.

The previous prime is 210121202120057. The next prime is 210121202120111. The reversal of 210121202120101 is 101021202121012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210121202120101 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 (210121202120111) 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, 32560180 + ... + 38476066.

It is an arithmetic number, because the mean of its divisors is an integer number (26305498842480).

Almost surely, 2^{210121202120101} is an apocalyptic number.

It is an amenable number.

210121202120101 is a deficient number, since it is larger than the sum of its proper divisors (322788619739).

210121202120101 is an equidigital number, since it uses as much as digits as its factorization.

210121202120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5970443.

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

Adding to 210121202120101 its reverse (101021202121012), we get a palindrome (311142404241113).

The spelling of 210121202120101 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred two million, one hundred twenty thousand, one hundred one".