101220121100 has 36 divisors (see below), whose sum is σ = 251025902064. Its totient is φ = 34704041280.

The previous prime is 101220121069. The next prime is 101220121109. The reversal of 101220121100 is 1121022101.

It is a super-3 number, since 3×101220121100³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (101220121109) 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, 72299387 + ... + 72300786.

It is an arithmetic number, because the mean of its divisors is an integer number (6972941724).

Almost surely, 2^101220121100 is an apocalyptic number.

101220121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101220121100 is an abundant number, since it is smaller than the sum of its proper divisors (149805780964).

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

101220121100 is a wasteful number, since it uses less digits than its factorization.

101220121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144600194 (or 144600187 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 101220121100 its reverse (1121022101), we get a palindrome (102341143201).

It can be divided in two parts, 1012201 and 21100, that added together give a palindrome (1033301).

The spelling of 101220121100 in words is "one hundred one billion, two hundred twenty million, one hundred twenty-one thousand, one hundred".