210121101220101 has 16 divisors (see below), whose sum is σ = 296879058000000. Its totient is φ = 131735133923328.

The previous prime is 210121101220099. The next prime is 210121101220171. The reversal of 210121101220101 is 101022101121012.

It is a happy number.

It is not a de Polignac number, because 210121101220101 - 2¹ = 210121101220099 is a prime.

It is a super-4 number, since 4×210121101220101⁴ (a number of 58 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121101220171) 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, 1649264401 + ... + 1649391798.

It is an arithmetic number, because the mean of its divisors is an integer number (18554941125000).

Almost surely, 2^{210121101220101} is an apocalyptic number.

It is an amenable number.

210121101220101 is a deficient number, since it is larger than the sum of its proper divisors (86757956779899).

210121101220101 is a wasteful number, since it uses less digits than its factorization.

210121101220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3298657468.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210121101220101 its reverse (101022101121012), we get a palindrome (311143202341113).

The spelling of 210121101220101 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred one million, two hundred twenty thousand, one hundred one".