11220121031 has 8 divisors (see below), whose sum is σ = 13014384000. Its totient is φ = 9473705208.

The previous prime is 11220121001. The next prime is 11220121051. The reversal of 11220121031 is 13012102211.

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 11220121031 - 2¹⁸ = 11219858887 is a prime.

It is a super-2 number, since 2×11220121031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11220120997 and 11220121015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220121001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11961281 + ... + 11962218.

It is an arithmetic number, because the mean of its divisors is an integer number (1626798000).

Almost surely, 2^11220121031 is an apocalyptic number.

11220121031 is a deficient number, since it is larger than the sum of its proper divisors (1794262969).

11220121031 is an equidigital number, since it uses as much as digits as its factorization.

11220121031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23923573.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11220121031 its reverse (13012102211), we get a palindrome (24232223242).

The spelling of 11220121031 in words is "eleven billion, two hundred twenty million, one hundred twenty-one thousand, thirty-one".