121121413021 has 32 divisors (see below), whose sum is σ = 146801571840. Its totient is φ = 97724442816.

The previous prime is 121121413001. The next prime is 121121413031. The reversal of 121121413021 is 120314121121.

It is not a de Polignac number, because 121121413021 - 2²¹ = 121119315869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121121413021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121413001) 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, 4762080 + ... + 4787446.

It is an arithmetic number, because the mean of its divisors is an integer number (4587549120).

Almost surely, 2^121121413021 is an apocalyptic number.

It is an amenable number.

121121413021 is a deficient number, since it is larger than the sum of its proper divisors (25680158819).

121121413021 is a wasteful number, since it uses less digits than its factorization.

121121413021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25993.

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

Adding to 121121413021 its reverse (120314121121), we get a palindrome (241435534142).

The spelling of 121121413021 in words is "one hundred twenty-one billion, one hundred twenty-one million, four hundred thirteen thousand, twenty-one".