101220221020 has 48 divisors (see below), whose sum is σ = 219458227968. Its totient is φ = 39175073280.

The previous prime is 101220221017. The next prime is 101220221057. The reversal of 101220221020 is 20122022101.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4746622 + ... + 4767898.

It is an arithmetic number, because the mean of its divisors is an integer number (4572046416).

Almost surely, 2^101220221020 is an apocalyptic number.

101220221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101220221020 is an abundant number, since it is smaller than the sum of its proper divisors (118238006948).

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

101220221020 is a wasteful number, since it uses less digits than its factorization.

101220221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28990 (or 28988 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 101220221020 its reverse (20122022101), we get a palindrome (121342243121).

The spelling of 101220221020 in words is "one hundred one billion, two hundred twenty million, two hundred twenty-one thousand, twenty".