102020121012100 has 18 divisors (see below), whose sum is σ = 221383662596474. Its totient is φ = 40808048404800.

The previous prime is 102020121012091. The next prime is 102020121012101. The reversal of 102020121012100 is 1210121020201.

It can be written as a sum of positive squares in 3 ways, for example, as 101566084 + 102020019446016 = 10078^2 + 10100496^2 .

It is not an unprimeable number, because it can be changed into a prime (102020121012101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 510100604961 + ... + 510100605160.

Almost surely, 2^{102020121012100} is an apocalyptic number.

102020121012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102020121012100 is an abundant number, since it is smaller than the sum of its proper divisors (119363541584374).

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

102020121012100 is a wasteful number, since it uses less digits than its factorization.

102020121012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020201210135 (or 1020201210128 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102020121012100 its reverse (1210121020201), we get a palindrome (103230242032301).

The spelling of 102020121012100 in words is "one hundred two trillion, twenty billion, one hundred twenty-one million, twelve thousand, one hundred".