1221110020031 has 8 divisors (see below), whose sum is σ = 1332516408528. Its totient is φ = 1109769696000.

The previous prime is 1221110019991. The next prime is 1221110020093. The reversal of 1221110020031 is 1300200111221.

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 1221110020031 - 2³⁴ = 1203930150847 is a prime.

It is a super-2 number, since 2×1221110020031² (a number of 25 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 = 1221110019988 and 1221110020015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221110023031) 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, 16477460 + ... + 16551401.

It is an arithmetic number, because the mean of its divisors is an integer number (166564551066).

Almost surely, 2^{1221110020031} is an apocalyptic number.

1221110020031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1221110020031 is a deficient number, since it is larger than the sum of its proper divisors (111406388497).

1221110020031 is a wasteful number, since it uses less digits than its factorization.

1221110020031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33032233.

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

Adding to 1221110020031 its reverse (1300200111221), we get a palindrome (2521310131252).

The spelling of 1221110020031 in words is "one trillion, two hundred twenty-one billion, one hundred ten million, twenty thousand, thirty-one".