1220403111 has 8 divisors (see below), whose sum is σ = 1634916864. Its totient is φ = 809745720.

The previous prime is 1220403109. The next prime is 1220403127. The reversal of 1220403111 is 1113040221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220403111 - 2¹ = 1220403109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220403211) 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, 963351 + ... + 964616.

It is an arithmetic number, because the mean of its divisors is an integer number (204364608).

Almost surely, 2^1220403111 is an apocalyptic number.

1220403111 is a deficient number, since it is larger than the sum of its proper divisors (414513753).

1220403111 is a wasteful number, since it uses less digits than its factorization.

1220403111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928181.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1220403111 is about 34934.2684337314. The cubic root of 1220403111 is about 1068.6474046450.

Adding to 1220403111 its reverse (1113040221), we get a palindrome (2333443332).

The spelling of 1220403111 in words is "one billion, two hundred twenty million, four hundred three thousand, one hundred eleven".