101213131212 has 36 divisors (see below), whose sum is σ = 255866554216. Its totient is φ = 33734776320.

The previous prime is 101213131211. The next prime is 101213131249. The reversal of 101213131212 is 212131312101.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×101213131212³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (101213131211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319287 + ... + 551697.

Almost surely, 2^101213131212 is an apocalyptic number.

101213131212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101213131212 is an abundant number, since it is smaller than the sum of its proper divisors (154653423004).

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

101213131212 is a wasteful number, since it uses less digits than its factorization.

101213131212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244518 (or 244513 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 101213131212 its reverse (212131312101), we get a palindrome (313344443313).

The spelling of 101213131212 in words is "one hundred one billion, two hundred thirteen million, one hundred thirty-one thousand, two hundred twelve".