30121231122121 has 4 divisors (see below), whose sum is σ = 30570801735952. Its totient is φ = 29671660508292.

The previous prime is 30121231122107. The next prime is 30121231122187. The reversal of 30121231122121 is 12122113212103.

It is a happy number.

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 30121231122121 - 2¹⁵ = 30121231089353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30121231122092 and 30121231122101.

It is not an unprimeable number, because it can be changed into a prime (30121231122221) 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, 224785306815 + ... + 224785306948.

It is an arithmetic number, because the mean of its divisors is an integer number (7642700433988).

Almost surely, 2^{30121231122121} is an apocalyptic number.

It is an amenable number.

30121231122121 is a deficient number, since it is larger than the sum of its proper divisors (449570613831).

30121231122121 is an equidigital number, since it uses as much as digits as its factorization.

30121231122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449570613830.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 30121231122121 its reverse (12122113212103), we get a palindrome (42243344334224).

The spelling of 30121231122121 in words is "thirty trillion, one hundred twenty-one billion, two hundred thirty-one million, one hundred twenty-two thousand, one hundred twenty-one".