102210212020121 has 4 divisors (see below), whose sum is σ = 102210294968592. Its totient is φ = 102210129071652.

The previous prime is 102210212020067. The next prime is 102210212020123. The reversal of 102210212020121 is 121020212012201.

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 102210212020121 - 2¹⁴ = 102210212003737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102210212020121.

It is not an unprimeable number, because it can be changed into a prime (102210212020123) 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, 39597611 + ... + 42099776.

It is an arithmetic number, because the mean of its divisors is an integer number (25552573742148).

Almost surely, 2^{102210212020121} is an apocalyptic number.

It is an amenable number.

102210212020121 is a deficient number, since it is larger than the sum of its proper divisors (82948471).

102210212020121 is an equidigital number, since it uses as much as digits as its factorization.

102210212020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82948470.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 102210212020121 its reverse (121020212012201), we get a palindrome (223230424032322).

The spelling of 102210212020121 in words is "one hundred two trillion, two hundred ten billion, two hundred twelve million, twenty thousand, one hundred twenty-one".