101221021020220 has 24 divisors (see below), whose sum is σ = 219893942217600. Its totient is φ = 39092256393792.

The previous prime is 101221021020199. The next prime is 101221021020239. The reversal of 101221021020220 is 22020120122101.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 101221021020194 and 101221021020203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87259500300 + ... + 87259501459.

It is an arithmetic number, because the mean of its divisors is an integer number (9162247592400).

Almost surely, 2^{101221021020220} is an apocalyptic number.

101221021020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101221021020220 is an abundant number, since it is smaller than the sum of its proper divisors (118672921197380).

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

101221021020220 is a wasteful number, since it uses less digits than its factorization.

101221021020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174519001797 (or 174519001795 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 101221021020220 its reverse (22020120122101), we get a palindrome (123241141142321).

The spelling of 101221021020220 in words is "one hundred one trillion, two hundred twenty-one billion, twenty-one million, twenty thousand, two hundred twenty".