1111220401 has 8 divisors (see below), whose sum is σ = 1116297000. Its totient is φ = 1106152320.

The previous prime is 1111220333. The next prime is 1111220431. The reversal of 1111220401 is 1040221111.

It can be written as a sum of positive squares in 4 ways, for example, as 781761600 + 329458801 = 27960^2 + 18151^2 .

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 1111220401 - 2⁷ = 1111220273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111220431) 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, 546655 + ... + 548683.

It is an arithmetic number, because the mean of its divisors is an integer number (139537125).

Almost surely, 2^1111220401 is an apocalyptic number.

It is an amenable number.

1111220401 is a deficient number, since it is larger than the sum of its proper divisors (5076599).

1111220401 is a wasteful number, since it uses less digits than its factorization.

1111220401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4259.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1111220401 is about 33334.9726413567. The cubic root of 1111220401 is about 1035.7781264475.

Adding to 1111220401 its reverse (1040221111), we get a palindrome (2151441512).

It can be divided in two parts, 11112 and 20401, that added together give a palindrome (31513).

The spelling of 1111220401 in words is "one billion, one hundred eleven million, two hundred twenty thousand, four hundred one".