121205525402 has 24 divisors (see below), whose sum is σ = 201058065216. Its totient is φ = 54750770256.

The previous prime is 121205525387. The next prime is 121205525417. The reversal of 121205525402 is 204525502121.

It is a happy number.

121205525402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (121205525387) and next prime (121205525417).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3798968 + ... + 3830739.

It is an arithmetic number, because the mean of its divisors is an integer number (8377419384).

Almost surely, 2^121205525402 is an apocalyptic number.

121205525402 is a deficient number, since it is larger than the sum of its proper divisors (79852539814).

121205525402 is a wasteful number, since it uses less digits than its factorization.

121205525402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7629782 (or 7629769 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 121205525402 in words is "one hundred twenty-one billion, two hundred five million, five hundred twenty-five thousand, four hundred two".