101120210021 has 4 divisors (see below), whose sum is σ = 102777918444. Its totient is φ = 99462501600.

The previous prime is 101120210017. The next prime is 101120210027. The reversal of 101120210021 is 120012021101.

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 10976752900 + 90143457121 = 104770^2 + 300239^2 .

It is a cyclic number.

It is not a de Polignac number, because 101120210021 - 2² = 101120210017 is a prime.

It is a super-2 number, since 2×101120210021² (a number of 23 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 = 101120209984 and 101120210011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101120210027) 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, 828854120 + ... + 828854241.

It is an arithmetic number, because the mean of its divisors is an integer number (25694479611).

Almost surely, 2^101120210021 is an apocalyptic number.

It is an amenable number.

101120210021 is a deficient number, since it is larger than the sum of its proper divisors (1657708423).

101120210021 is an equidigital number, since it uses as much as digits as its factorization.

101120210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657708422.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101120210021 its reverse (120012021101), we get a palindrome (221132231122).

The spelling of 101120210021 in words is "one hundred one billion, one hundred twenty million, two hundred ten thousand, twenty-one".