1221030212123 has 8 divisors (see below), whose sum is σ = 1226167826400. Its totient is φ = 1215893185920.

The previous prime is 1221030212119. The next prime is 1221030212131. The reversal of 1221030212123 is 3212120301221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221030212123 - 2² = 1221030212119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221030212095 and 1221030212104.

It is not an unprimeable number, because it can be changed into a prime (1221030212153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4295978 + ... + 4571376.

It is an arithmetic number, because the mean of its divisors is an integer number (153270978300).

Almost surely, 2^{1221030212123} is an apocalyptic number.

1221030212123 is a deficient number, since it is larger than the sum of its proper divisors (5137614277).

1221030212123 is a wasteful number, since it uses less digits than its factorization.

1221030212123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294037.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1221030212123 its reverse (3212120301221), we get a palindrome (4433150513344).

The spelling of 1221030212123 in words is "one trillion, two hundred twenty-one billion, thirty million, two hundred twelve thousand, one hundred twenty-three".