121022100021101 has 4 divisors (see below), whose sum is σ = 121541508175932. Its totient is φ = 120502691866272.

The previous prime is 121022100021079. The next prime is 121022100021131. The reversal of 121022100021101 is 101120001220121.

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 13303337095876 + 107718762925225 = 3647374^2 + 10378765^2 .

It is a cyclic number.

It is not a de Polignac number, because 121022100021101 - 2¹⁸ = 121022099758957 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 (121022100021131) 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, 259704077066 + ... + 259704077531.

It is an arithmetic number, because the mean of its divisors is an integer number (30385377043983).

Almost surely, 2^{121022100021101} is an apocalyptic number.

It is an amenable number.

121022100021101 is a deficient number, since it is larger than the sum of its proper divisors (519408154831).

121022100021101 is an equidigital number, since it uses as much as digits as its factorization.

121022100021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519408154830.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121022100021101 its reverse (101120001220121), we get a palindrome (222142101241222).

The spelling of 121022100021101 in words is "one hundred twenty-one trillion, twenty-two billion, one hundred million, twenty-one thousand, one hundred one".