61211120103 has 24 divisors (see below), whose sum is σ = 103396861568. Its totient is φ = 34164344592.

The previous prime is 61211120099. The next prime is 61211120107. The reversal of 61211120103 is 30102111216.

It is an interprime number because it is at equal distance from previous prime (61211120099) and next prime (61211120107).

It is not a de Polignac number, because 61211120103 - 2² = 61211120099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61211120107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11295025 + ... + 11300442.

Almost surely, 2^61211120103 is an apocalyptic number.

61211120103 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

61211120103 is a deficient number, since it is larger than the sum of its proper divisors (42185741465).

61211120103 is a wasteful number, since it uses less digits than its factorization.

61211120103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22595523 (or 22595520 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 61211120103 its reverse (30102111216), we get a palindrome (91313231319).

The spelling of 61211120103 in words is "sixty-one billion, two hundred eleven million, one hundred twenty thousand, one hundred three".