121211213402 has 16 divisors (see below), whose sum is σ = 189032121600. Its totient is φ = 58228636320.

The previous prime is 121211213353. The next prime is 121211213407. The reversal of 121211213402 is 204312112121.

It is not an unprimeable number, because it can be changed into a prime (121211213407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7023827 + ... + 7041062.

It is an arithmetic number, because the mean of its divisors is an integer number (11814507600).

Almost surely, 2^121211213402 is an apocalyptic number.

121211213402 is a deficient number, since it is larger than the sum of its proper divisors (67820908198).

121211213402 is a wasteful number, since it uses less digits than its factorization.

121211213402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14065061.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 121211213402 its reverse (204312112121), we get a palindrome (325523325523).

The spelling of 121211213402 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred thirteen thousand, four hundred two".