101140212121021 has 4 divisors (see below), whose sum is σ = 107089636363452. Its totient is φ = 95190787878592.

The previous prime is 101140212121001. The next prime is 101140212121037. The reversal of 101140212121021 is 120121212041101.

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 38457982102500 + 62682230018521 = 6201450^2 + 7917211^2 .

It is a cyclic number.

It is not a de Polignac number, because 101140212121021 - 2⁹ = 101140212120509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101140212121021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101140212121001) 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, 2974712121190 + ... + 2974712121223.

It is an arithmetic number, because the mean of its divisors is an integer number (26772409090863).

Almost surely, 2^{101140212121021} is an apocalyptic number.

It is an amenable number.

101140212121021 is a deficient number, since it is larger than the sum of its proper divisors (5949424242431).

101140212121021 is an equidigital number, since it uses as much as digits as its factorization.

101140212121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5949424242430.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 101140212121021 its reverse (120121212041101), we get a palindrome (221261424162122).

The spelling of 101140212121021 in words is "one hundred one trillion, one hundred forty billion, two hundred twelve million, one hundred twenty-one thousand, twenty-one".