102021121220212 has 6 divisors (see below), whose sum is σ = 178536962135378. Its totient is φ = 51010560610104.

The previous prime is 102021121220167. The next prime is 102021121220231. The reversal of 102021121220212 is 212022121120201.

It can be written as a sum of positive squares in only one way, i.e., 71266621105936 + 30754500114276 = 8441956^2 + 5545674^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 102021121220212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12752640152523 + ... + 12752640152530.

Almost surely, 2^{102021121220212} is an apocalyptic number.

It is an amenable number.

102021121220212 is a deficient number, since it is larger than the sum of its proper divisors (76515840915166).

102021121220212 is a wasteful number, since it uses less digits than its factorization.

102021121220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25505280305057 (or 25505280305055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 102021121220212 its reverse (212022121120201), we get a palindrome (314043242340413).

The spelling of 102021121220212 in words is "one hundred two trillion, twenty-one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twelve".