1111021401 has 16 divisors (see below), whose sum is σ = 1732358144. Its totient is φ = 620104464.

The previous prime is 1111021381. The next prime is 1111021421. The reversal of 1111021401 is 1041201111.

It is an interprime number because it is at equal distance from previous prime (1111021381) and next prime (1111021421).

It is not a de Polignac number, because 1111021401 - 2²² = 1106827097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1111021421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 614281 + ... + 616086.

It is an arithmetic number, because the mean of its divisors is an integer number (108272384).

Almost surely, 2^1111021401 is an apocalyptic number.

It is an amenable number.

1111021401 is a deficient number, since it is larger than the sum of its proper divisors (621336743).

1111021401 is a wasteful number, since it uses less digits than its factorization.

1111021401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230420.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1111021401 is about 33331.9876545039. The cubic root of 1111021401 is about 1035.7162928837.

Adding to 1111021401 its reverse (1041201111), we get a palindrome (2152222512).

The spelling of 1111021401 in words is "one billion, one hundred eleven million, twenty-one thousand, four hundred one".