121980212 has 6 divisors (see below), whose sum is σ = 213465378. Its totient is φ = 60990104.

The previous prime is 121980193. The next prime is 121980217. The reversal of 121980212 is 212089121.

It can be written as a sum of positive squares in only one way, i.e., 108701476 + 13278736 = 10426^2 + 3644^2 .

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121980217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15247523 + ... + 15247530.

It is an arithmetic number, because the mean of its divisors is an integer number (35577563).

Almost surely, 2^121980212 is an apocalyptic number.

It is an amenable number.

121980212 is a deficient number, since it is larger than the sum of its proper divisors (91485166).

121980212 is a wasteful number, since it uses less digits than its factorization.

121980212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30495057 (or 30495055 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 121980212 is about 11044.4652201906. The cubic root of 121980212 is about 495.9407501633.

The spelling of 121980212 in words is "one hundred twenty-one million, nine hundred eighty thousand, two hundred twelve".