101121231 has 16 divisors (see below), whose sum is σ = 139932000. Its totient is φ = 64877568.
The previous prime is 101121203. The next prime is 101121247. The reversal of 101121231 is 132121101.
It is not a de Polignac number, because 101121231 - 226 = 34012367 is a prime.
It is a super-2 number, since 2×1011212312 = 20451006717910722, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (101121281) 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, 27595 + ... + 31043.
It is an arithmetic number, because the mean of its divisors is an integer number (8745750).
Almost surely, 2101121231 is an apocalyptic number.
101121231 is a deficient number, since it is larger than the sum of its proper divisors (38810769).
101121231 is a wasteful number, since it uses less digits than its factorization.
101121231 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3818.
The product of its (nonzero) digits is 12, while the sum is 12.
The square root of 101121231 is about 10055.9052799835. The cubic root of 101121231 is about 465.8872043061.
Adding to 101121231 its reverse (132121101), we get a palindrome (233242332).
The spelling of 101121231 in words is "one hundred one million, one hundred twenty-one thousand, two hundred thirty-one".
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