121021220233 has 4 divisors (see below), whose sum is σ = 127390758160. Its totient is φ = 114651682308.

The previous prime is 121021220231. The next prime is 121021220249. The reversal of 121021220233 is 332022120121.

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 121021220233 - 2¹ = 121021220231 is a prime.

It is a super-2 number, since 2×121021220233² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 6369537907 = 121021220233 / (1 + 2 + 1 + 0 + 2 + 1 + 2 + 2 + 0 + 2 + 3 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121021220233.

It is not an unprimeable number, because it can be changed into a prime (121021220231) 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, 3184768935 + ... + 3184768972.

It is an arithmetic number, because the mean of its divisors is an integer number (31847689540).

Almost surely, 2^121021220233 is an apocalyptic number.

It is an amenable number.

121021220233 is a deficient number, since it is larger than the sum of its proper divisors (6369537927).

121021220233 is an equidigital number, since it uses as much as digits as its factorization.

121021220233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6369537926.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 121021220233 its reverse (332022120121), we get a palindrome (453043340354).

The spelling of 121021220233 in words is "one hundred twenty-one billion, twenty-one million, two hundred twenty thousand, two hundred thirty-three".