1221123031001 has 8 divisors (see below), whose sum is σ = 1250929849344. Its totient is φ = 1191317323680.

The previous prime is 1221123030997. The next prime is 1221123031013. The reversal of 1221123031001 is 1001303211221.

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 1221123031001 - 2² = 1221123030997 is a prime.

It is a super-2 number, since 2×1221123031001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221123031021) 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, 2217536 + ... + 2712878.

It is an arithmetic number, because the mean of its divisors is an integer number (156366231168).

Almost surely, 2^{1221123031001} is an apocalyptic number.

It is an amenable number.

1221123031001 is a deficient number, since it is larger than the sum of its proper divisors (29806818343).

1221123031001 is an equidigital number, since it uses as much as digits as its factorization.

1221123031001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555511.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1221123031001 its reverse (1001303211221), we get a palindrome (2222426242222).

The spelling of 1221123031001 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-three million, thirty-one thousand, one".