101221112220020 has 48 divisors (see below), whose sum is σ = 228916343230848. Its totient is φ = 37373801400960.

The previous prime is 101221112220013. The next prime is 101221112220023. The reversal of 101221112220020 is 20022211122101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221112220023) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 82385057 + ... + 83604663.

It is an arithmetic number, because the mean of its divisors is an integer number (4769090483976).

Almost surely, 2^{101221112220020} is an apocalyptic number.

101221112220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101221112220020 is an abundant number, since it is smaller than the sum of its proper divisors (127695231010828).

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

101221112220020 is a wasteful number, since it uses less digits than its factorization.

101221112220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538840 (or 1538838 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 101221112220020 its reverse (20022211122101), we get a palindrome (121243323342121).

The spelling of 101221112220020 in words is "one hundred one trillion, two hundred twenty-one billion, one hundred twelve million, two hundred twenty thousand, twenty".