102100010020121 has 4 divisors (see below), whose sum is σ = 102307953014544. Its totient is φ = 101892067025700.

The previous prime is 102100010020117. The next prime is 102100010020139. The reversal of 102100010020121 is 121020010001201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102100010020121 - 2² = 102100010020117 is a prime.

It is a super-2 number, since 2×102100010020121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102100010020181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103971496475 + ... + 103971497456.

It is an arithmetic number, because the mean of its divisors is an integer number (25576988253636).

Almost surely, 2^{102100010020121} is an apocalyptic number.

It is an amenable number.

102100010020121 is a deficient number, since it is larger than the sum of its proper divisors (207942994423).

102100010020121 is an equidigital number, since it uses as much as digits as its factorization.

102100010020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207942994422.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 102100010020121 its reverse (121020010001201), we get a palindrome (223120020021322).

The spelling of 102100010020121 in words is "one hundred two trillion, one hundred billion, ten million, twenty thousand, one hundred twenty-one".