61000120001 has 16 divisors (see below), whose sum is σ = 66184620480. Its totient is φ = 56007843840.

The previous prime is 61000119979. The next prime is 61000120007. The reversal of 61000120001 is 10002100016.

It is a cyclic number.

It is not a de Polignac number, because 61000120001 - 2²⁶ = 60933011137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61000120007) 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, 100736 + ... + 363521.

It is an arithmetic number, because the mean of its divisors is an integer number (4136538780).

Almost surely, 2^61000120001 is an apocalyptic number.

It is an amenable number.

61000120001 is a deficient number, since it is larger than the sum of its proper divisors (5184500479).

61000120001 is a wasteful number, since it uses less digits than its factorization.

61000120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464464.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 61000120001 its reverse (10002100016), we get a palindrome (71002220017).

The spelling of 61000120001 in words is "sixty-one billion, one hundred twenty thousand, one".