101202021020 has 96 divisors (see below), whose sum is σ = 227132760960. Its totient is φ = 37744312320.

The previous prime is 101202020981. The next prime is 101202021121. The reversal of 101202021020 is 20120202101.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 101202020992 and 101202021010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19160780 + ... + 19166060.

It is an arithmetic number, because the mean of its divisors is an integer number (2365966260).

Almost surely, 2^101202021020 is an apocalyptic number.

101202021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101202021020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113566380480).

101202021020 is an abundant number, since it is smaller than the sum of its proper divisors (125930739940).

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

101202021020 is a wasteful number, since it uses less digits than its factorization.

101202021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5823 (or 5821 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 101202021020 its reverse (20120202101), we get a palindrome (121322223121).

The spelling of 101202021020 in words is "one hundred one billion, two hundred two million, twenty-one thousand, twenty".