1220025105 has 32 divisors (see below), whose sum is σ = 2335777920. Its totient is φ = 600626880.

The previous prime is 1220025091. The next prime is 1220025109. The reversal of 1220025105 is 5015200221.

It is not a de Polignac number, because 1220025105 - 2⁷ = 1220024977 is a prime.

It is a super-2 number, since 2×1220025105² = 2976922513660522050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220025109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 345831 + ... + 349340.

It is an arithmetic number, because the mean of its divisors is an integer number (72993060).

Almost surely, 2^1220025105 is an apocalyptic number.

1220025105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220025105 is a deficient number, since it is larger than the sum of its proper divisors (1115752815).

1220025105 is a wasteful number, since it uses less digits than its factorization.

1220025105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695198 (or 695192 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1220025105 is about 34928.8577683268. The cubic root of 1220025105 is about 1068.5370594535.

Adding to 1220025105 its reverse (5015200221), we get a palindrome (6235225326).

The spelling of 1220025105 in words is "one billion, two hundred twenty million, twenty-five thousand, one hundred five".