1121212221013 has 4 divisors (see below), whose sum is σ = 1180223390560. Its totient is φ = 1062201051468.

The previous prime is 1121212221011. The next prime is 1121212221067. The reversal of 1121212221013 is 3101222121211.

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 1121212221013 - 2¹ = 1121212221011 is a prime.

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: 59011169527 = 1121212221013 / (1 + 1 + 2 + 1 + 2 + 1 + 2 + 2 + 2 + 1 + 0 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121212221011) 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, 29505584745 + ... + 29505584782.

It is an arithmetic number, because the mean of its divisors is an integer number (295055847640).

Almost surely, 2^{1121212221013} is an apocalyptic number.

It is an amenable number.

1121212221013 is a deficient number, since it is larger than the sum of its proper divisors (59011169547).

1121212221013 is an equidigital number, since it uses as much as digits as its factorization.

1121212221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59011169546.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1121212221013 its reverse (3101222121211), we get a palindrome (4222434342224).

The spelling of 1121212221013 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, thirteen".