101661011 has 4 divisors (see below), whose sum is σ = 101689224. Its totient is φ = 101632800.

The previous prime is 101660983. The next prime is 101661019. The reversal of 101661011 is 110166101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110166101 = 97 ⋅1135733.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101661011 is a prime.

It is a super-2 number, since 2×101661011² = 20669922315084242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101661019) 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, 7745 + ... + 16226.

It is an arithmetic number, because the mean of its divisors is an integer number (25422306).

Almost surely, 2^101661011 is an apocalyptic number.

101661011 is a deficient number, since it is larger than the sum of its proper divisors (28213).

101661011 is an equidigital number, since it uses as much as digits as its factorization.

101661011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28212.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 101661011 is about 10082.7085150767. The cubic root of 101661011 is about 466.7146944334.

The spelling of 101661011 in words is "one hundred one million, six hundred sixty-one thousand, eleven".