1201121120221 has 4 divisors (see below), whose sum is σ = 1310313949344. Its totient is φ = 1091928291100.

The previous prime is 1201121120189. The next prime is 1201121120237. The reversal of 1201121120221 is 1220211211021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1201121120221 - 2⁵ = 1201121120189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201121120195 and 1201121120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201121120621) 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, 54596414545 + ... + 54596414566.

It is an arithmetic number, because the mean of its divisors is an integer number (327578487336).

Almost surely, 2^{1201121120221} is an apocalyptic number.

1201121120221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201121120221 is a deficient number, since it is larger than the sum of its proper divisors (109192829123).

1201121120221 is a wasteful number, since it uses less digits than its factorization.

1201121120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109192829122.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1201121120221 its reverse (1220211211021), we get a palindrome (2421332331242).

The spelling of 1201121120221 in words is "one trillion, two hundred one billion, one hundred twenty-one million, one hundred twenty thousand, two hundred twenty-one".