101000009977 has 4 divisors (see below), whose sum is σ = 101018112676. Its totient is φ = 100981907280.

The previous prime is 101000009953. The next prime is 101000009983. The reversal of 101000009977 is 779900000101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 779900000101 = 25357 ⋅30756793.

It can be written as a sum of positive squares in 2 ways, for example, as 36985443856 + 64014566121 = 192316^2 + 253011^2 .

It is a cyclic number.

It is not a de Polignac number, because 101000009977 - 2³¹ = 98852526329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101006009977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9042978 + ... + 9054139.

It is an arithmetic number, because the mean of its divisors is an integer number (25254528169).

Almost surely, 2^101000009977 is an apocalyptic number.

It is an amenable number.

101000009977 is a deficient number, since it is larger than the sum of its proper divisors (18102699).

101000009977 is an equidigital number, since it uses as much as digits as its factorization.

101000009977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18102698.

The product of its (nonzero) digits is 3969, while the sum is 34.

The spelling of 101000009977 in words is "one hundred one billion, nine thousand, nine hundred seventy-seven".