101211121220 has 48 divisors (see below), whose sum is σ = 232054454016. Its totient is φ = 36774048000.

The previous prime is 101211121199. The next prime is 101211121229. The reversal of 101211121220 is 22121112101.

It is a junction number, because it is equal to n+sod(n) for n = 101211121195 and 101211121204.

It is not an unprimeable number, because it can be changed into a prime (101211121229) 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, 83960 + ... + 457680.

It is an arithmetic number, because the mean of its divisors is an integer number (4834467792).

Almost surely, 2^101211121220 is an apocalyptic number.

101211121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101211121220 is an abundant number, since it is smaller than the sum of its proper divisors (130843332796).

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

101211121220 is a wasteful number, since it uses less digits than its factorization.

101211121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374972 (or 374970 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 101211121220 its reverse (22121112101), we get a palindrome (123332233321).

The spelling of 101211121220 in words is "one hundred one billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twenty".