101121211020 has 24 divisors (see below), whose sum is σ = 283139391024. Its totient is φ = 26965656256.

The previous prime is 101121210997. The next prime is 101121211033. The reversal of 101121211020 is 20112121101.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 101121210987 and 101121211005.

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 7 ways as a sum of consecutive naturals, for example, 842676699 + ... + 842676818.

It is an arithmetic number, because the mean of its divisors is an integer number (11797474626).

Almost surely, 2^101121211020 is an apocalyptic number.

101121211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101121211020 is an abundant number, since it is smaller than the sum of its proper divisors (182018180004).

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

101121211020 is a wasteful number, since it uses less digits than its factorization.

101121211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685353529 (or 1685353527 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 101121211020 its reverse (20112121101), we get a palindrome (121233332121).

The spelling of 101121211020 in words is "one hundred one billion, one hundred twenty-one million, two hundred eleven thousand, twenty".