121220203402 has 8 divisors (see below), whose sum is σ = 187695798912. Its totient is φ = 58654937100.

The previous prime is 121220203399. The next prime is 121220203427. The reversal of 121220203402 is 204302022121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 121220203402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977582224 + ... + 977582347.

It is an arithmetic number, because the mean of its divisors is an integer number (23461974864).

Almost surely, 2^121220203402 is an apocalyptic number.

121220203402 is a deficient number, since it is larger than the sum of its proper divisors (66475595510).

121220203402 is a wasteful number, since it uses less digits than its factorization.

121220203402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955164604.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 121220203402 its reverse (204302022121), we get a palindrome (325522225523).

The spelling of 121220203402 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred three thousand, four hundred two".