101221011211212 has 96 divisors (see below), whose sum is σ = 262952984145600. Its totient is φ = 33672439696896.

The previous prime is 101221011211153. The next prime is 101221011211217. The reversal of 101221011211212 is 212112110122101.

It is a happy number.

101221011211212 is a `hidden beast` number, since 10 + 1 + 221 + 0 + 11 + 211 + 212 = 666.

101221011211212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×101221011211212² (a number of 29 digits) contains 22 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 (101221011211217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1880950018 + ... + 1881003830.

It is an arithmetic number, because the mean of its divisors is an integer number (2739093584850).

Almost surely, 2^{101221011211212} is an apocalyptic number.

101221011211212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101221011211212 is an abundant number, since it is smaller than the sum of its proper divisors (161731972934388).

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

101221011211212 is a wasteful number, since it uses less digits than its factorization.

101221011211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88552 (or 88544 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 101221011211212 its reverse (212112110122101), we get a palindrome (313333121333313).

The spelling of 101221011211212 in words is "one hundred one trillion, two hundred twenty-one billion, eleven million, two hundred eleven thousand, two hundred twelve".