101201022110021 has 4 divisors (see below), whose sum is σ = 102203012428044. Its totient is φ = 100199031792000.

The previous prime is 101201022109939. The next prime is 101201022110099. The reversal of 101201022110021 is 120011220102101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63882533949025 + 37318488160996 = 7992655^2 + 6108886^2 .

It is a cyclic number.

It is not a de Polignac number, because 101201022110021 - 2¹⁰ = 101201022108997 is a prime.

It is a super-2 number, since 2×101201022110021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101201022109978 and 101201022110005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101201022110821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500995158860 + ... + 500995159061.

It is an arithmetic number, because the mean of its divisors is an integer number (25550753107011).

Almost surely, 2^{101201022110021} is an apocalyptic number.

It is an amenable number.

101201022110021 is a deficient number, since it is larger than the sum of its proper divisors (1001990318023).

101201022110021 is a wasteful number, since it uses less digits than its factorization.

101201022110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001990318022.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 101201022110021 its reverse (120011220102101), we get a palindrome (221212242212122).

The spelling of 101201022110021 in words is "one hundred one trillion, two hundred one billion, twenty-two million, one hundred ten thousand, twenty-one".