101223211212 has 36 divisors (see below), whose sum is σ = 258403157376. Its totient is φ = 33406999200.

The previous prime is 101223211147. The next prime is 101223211277. The reversal of 101223211212 is 212112322101.

101223211212 is a `hidden beast` number, since 10 + 122 + 321 + 1 + 212 = 666.

It is an interprime number because it is at equal distance from previous prime (101223211147) and next prime (101223211277).

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

It is a super-2 number, since 2×101223211212² (a number of 23 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13915948 + ... + 13923219.

Almost surely, 2^101223211212 is an apocalyptic number.

101223211212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101223211212 is an abundant number, since it is smaller than the sum of its proper divisors (157179946164).

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

101223211212 is a wasteful number, since it uses less digits than its factorization.

101223211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27839278 (or 27839273 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 101223211212 its reverse (212112322101), we get a palindrome (313335533313).

The spelling of 101223211212 in words is "one hundred one billion, two hundred twenty-three million, two hundred eleven thousand, two hundred twelve".