102121112220212 has 6 divisors (see below), whose sum is σ = 178711946385378. Its totient is φ = 51060556110104.

The previous prime is 102121112220157. The next prime is 102121112220227. The reversal of 102121112220212 is 212022211121201.

It can be written as a sum of positive squares in only one way, i.e., 61375410388516 + 40745701831696 = 7834246^2 + 6383236^2 .

It is a super-2 number, since 2×102121112220212² (a number of 29 digits) contains 22 as substring.

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, 12765139027523 + ... + 12765139027530.

It is an arithmetic number, because the mean of its divisors is an integer number (29785324397563).

Almost surely, 2^{102121112220212} is an apocalyptic number.

It is an amenable number.

102121112220212 is a deficient number, since it is larger than the sum of its proper divisors (76590834165166).

102121112220212 is a wasteful number, since it uses less digits than its factorization.

102121112220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25530278055057 (or 25530278055055 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 102121112220212 its reverse (212022211121201), we get a palindrome (314143323341413).

The spelling of 102121112220212 in words is "one hundred two trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twenty thousand, two hundred twelve".