101121101100021 has 32 divisors (see below), whose sum is σ = 139822967984128. Its totient is φ = 64952257631040.

The previous prime is 101121101100011. The next prime is 101121101100049. The reversal of 101121101100021 is 120001101121101.

It is not a de Polignac number, because 101121101100021 - 2²³ = 101121092711413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101121101100001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262892580 + ... + 263276946.

It is an arithmetic number, because the mean of its divisors is an integer number (4369467749504).

Almost surely, 2^{101121101100021} is an apocalyptic number.

It is an amenable number.

101121101100021 is a deficient number, since it is larger than the sum of its proper divisors (38701866884107).

101121101100021 is a wasteful number, since it uses less digits than its factorization.

101121101100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407521.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 101121101100021 its reverse (120001101121101), we get a palindrome (221122202221122).

The spelling of 101121101100021 in words is "one hundred one trillion, one hundred twenty-one billion, one hundred one million, one hundred thousand, twenty-one".