121313313030021 has 64 divisors (see below), whose sum is σ = 186519818354688. Its totient is φ = 68701755852288.

The previous prime is 121313313030011. The next prime is 121313313030029. The reversal of 121313313030021 is 120030313313121.

It is not a de Polignac number, because 121313313030021 - 2¹³ = 121313313021829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121313313029973 and 121313313030000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313313030029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10460743795 + ... + 10460755391.

It is an arithmetic number, because the mean of its divisors is an integer number (2914372161792).

Almost surely, 2^{121313313030021} is an apocalyptic number.

It is an amenable number.

121313313030021 is a deficient number, since it is larger than the sum of its proper divisors (65206505324667).

121313313030021 is a wasteful number, since it uses less digits than its factorization.

121313313030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21650.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 121313313030021 its reverse (120030313313121), we get a palindrome (241343626343142).

The spelling of 121313313030021 in words is "one hundred twenty-one trillion, three hundred thirteen billion, three hundred thirteen million, thirty thousand, twenty-one".