210101021121101 has 6 divisors (see below), whose sum is σ = 230937486025806. Its totient is φ = 191000928291800.

The previous prime is 210101021121041. The next prime is 210101021121109. The reversal of 210101021121101 is 101121120101012.

It can be written as a sum of positive squares in only one way, i.e., 188944240998601 + 21156780122500 = 13745699^2 + 4599650^2 .

It is not a de Polignac number, because 210101021121101 - 2¹⁰ = 210101021120077 is a prime.

It is a super-2 number, since 2×210101021121101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210101021121109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 868186037570 + ... + 868186037811.

It is an arithmetic number, because the mean of its divisors is an integer number (38489581004301).

Almost surely, 2^{210101021121101} is an apocalyptic number.

It is an amenable number.

210101021121101 is a deficient number, since it is larger than the sum of its proper divisors (20836464904705).

210101021121101 is a wasteful number, since it uses less digits than its factorization.

210101021121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736372075403 (or 1736372075392 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 210101021121101 its reverse (101121120101012), we get a palindrome (311222141222113).

The spelling of 210101021121101 in words is "two hundred ten trillion, one hundred one billion, twenty-one million, one hundred twenty-one thousand, one hundred one".