121101112110021 has 8 divisors (see below), whose sum is σ = 161470014806880. Its totient is φ = 80733142076592.

The previous prime is 121101112109947. The next prime is 121101112110049. The reversal of 121101112110021 is 120011211101121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121101112110021 - 2⁷ = 121101112109893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101112110071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232862830 + ... + 233382303.

It is an arithmetic number, because the mean of its divisors is an integer number (20183751850860).

Almost surely, 2^{121101112110021} is an apocalyptic number.

It is an amenable number.

121101112110021 is a deficient number, since it is larger than the sum of its proper divisors (40368902696859).

121101112110021 is an equidigital number, since it uses as much as digits as its factorization.

121101112110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466331715.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 121101112110021 its reverse (120011211101121), we get a palindrome (241112323211142).

The spelling of 121101112110021 in words is "one hundred twenty-one trillion, one hundred one billion, one hundred twelve million, one hundred ten thousand, twenty-one".