101212140 has 48 divisors (see below), whose sum is σ = 288207360. Its totient is φ = 26531520.

The previous prime is 101212127. The next prime is 101212141. The reversal of 101212140 is 41212101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (101212141) 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, 10756 + ... + 17835.

It is an arithmetic number, because the mean of its divisors is an integer number (6004320).

Almost surely, 2^101212140 is an apocalyptic number.

101212140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101212140 is an abundant number, since it is smaller than the sum of its proper divisors (186995220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101212140 is a wasteful number, since it uses less digits than its factorization.

101212140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28662 (or 28660 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 101212140 is about 10060.4244443264. The cubic root of 101212140 is about 466.0267749111.

Adding to 101212140 its reverse (41212101), we get a palindrome (142424241).

The spelling of 101212140 in words is "one hundred one million, two hundred twelve thousand, one hundred forty".