101649811231 has 4 divisors (see below), whose sum is σ = 101658307464. Its totient is φ = 101641315000.

The previous prime is 101649811189. The next prime is 101649811259. The reversal of 101649811231 is 132118946101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 101649811231 - 2⁹ = 101649810719 is a prime.

It is a super-2 number, since 2×101649811231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101649811261) 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, 4230145 + ... + 4254106.

It is an arithmetic number, because the mean of its divisors is an integer number (25414576866).

Almost surely, 2^101649811231 is an apocalyptic number.

101649811231 is a deficient number, since it is larger than the sum of its proper divisors (8496233).

101649811231 is an equidigital number, since it uses as much as digits as its factorization.

101649811231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8496232.

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 101649811231 in words is "one hundred one billion, six hundred forty-nine million, eight hundred eleven thousand, two hundred thirty-one".