121120212211021 has 32 divisors (see below), whose sum is σ = 124497790560000. Its totient is φ = 117792098726400.

The previous prime is 121120212211007. The next prime is 121120212211043. The reversal of 121120212211021 is 120112212021121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121120212211021 - 2²⁹ = 121119675340109 is a prime.

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 121120212211021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121120212215021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7454002105 + ... + 7454018353.

It is an arithmetic number, because the mean of its divisors is an integer number (3890555955000).

Almost surely, 2^{121120212211021} is an apocalyptic number.

It is an amenable number.

121120212211021 is a deficient number, since it is larger than the sum of its proper divisors (3377578348979).

121120212211021 is a wasteful number, since it uses less digits than its factorization.

121120212211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18565.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121120212211021 its reverse (120112212021121), we get a palindrome (241232424232142).

The spelling of 121120212211021 in words is "one hundred twenty-one trillion, one hundred twenty billion, two hundred twelve million, two hundred eleven thousand, twenty-one".