101121120021001 has 4 divisors (see below), whose sum is σ = 101184439446532. Its totient is φ = 101057800595472.

The previous prime is 101121120020971. The next prime is 101121120021049. The reversal of 101121120021001 is 100120021121101.

It is a happy number.

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 51226957604601 + 49894162416400 = 7157301^2 + 7063580^2 .

It is a cyclic number.

It is not a de Polignac number, because 101121120021001 - 2⁷ = 101121120020873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101121120021101) 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, 31659710370 + ... + 31659713563.

It is an arithmetic number, because the mean of its divisors is an integer number (25296109861633).

Almost surely, 2^{101121120021001} is an apocalyptic number.

It is an amenable number.

101121120021001 is a deficient number, since it is larger than the sum of its proper divisors (63319425531).

101121120021001 is an equidigital number, since it uses as much as digits as its factorization.

101121120021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63319425530.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101121120021001 its reverse (100120021121101), we get a palindrome (201241141142102).

The spelling of 101121120021001 in words is "one hundred one trillion, one hundred twenty-one billion, one hundred twenty million, twenty-one thousand, one".