103121210020020 has 24 divisors (see below), whose sum is σ = 288739388056224. Its totient is φ = 27498989338656.

The previous prime is 103121210019991. The next prime is 103121210020021. The reversal of 103121210020020 is 20020012121301.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103121210020021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 859343416774 + ... + 859343416893.

It is an arithmetic number, because the mean of its divisors is an integer number (12030807835676).

Almost surely, 2^{103121210020020} is an apocalyptic number.

103121210020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103121210020020 is an abundant number, since it is smaller than the sum of its proper divisors (185618178036204).

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

103121210020020 is a wasteful number, since it uses less digits than its factorization.

103121210020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718686833679 (or 1718686833677 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 103121210020020 its reverse (20020012121301), we get a palindrome (123141222141321).

The spelling of 103121210020020 in words is "one hundred three trillion, one hundred twenty-one billion, two hundred ten million, twenty thousand, twenty".