101021244020 has 48 divisors (see below), whose sum is σ = 224544028800. Its totient is φ = 38070207360.

The previous prime is 101021243993. The next prime is 101021244053. The reversal of 101021244020 is 20442120101.

It is a self number, because there is not a number n which added to its sum of digits gives 101021244020.

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, 665600 + ... + 803159.

It is an arithmetic number, because the mean of its divisors is an integer number (4678000600).

Almost surely, 2^101021244020 is an apocalyptic number.

101021244020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101021244020 is an abundant number, since it is smaller than the sum of its proper divisors (123522784780).

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

101021244020 is a wasteful number, since it uses less digits than its factorization.

101021244020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468968 (or 1468966 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 101021244020 its reverse (20442120101), we get a palindrome (121463364121).

The spelling of 101021244020 in words is "one hundred one billion, twenty-one million, two hundred forty-four thousand, twenty".