121010602402 has 4 divisors (see below), whose sum is σ = 181515903606. Its totient is φ = 60505301200.

The previous prime is 121010602277. The next prime is 121010602409. The reversal of 121010602402 is 204206010121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204206010121 = 179 ⋅1140815699.

It can be written as a sum of positive squares in only one way, i.e., 114588343081 + 6422259321 = 338509^2 + 80139^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121010602402.

It is not an unprimeable number, because it can be changed into a prime (121010602409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30252650599 + ... + 30252650602.

Almost surely, 2^121010602402 is an apocalyptic number.

121010602402 is a deficient number, since it is larger than the sum of its proper divisors (60505301204).

121010602402 is an equidigital number, since it uses as much as digits as its factorization.

121010602402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60505301203.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121010602402 its reverse (204206010121), we get a palindrome (325216612523).

The spelling of 121010602402 in words is "one hundred twenty-one billion, ten million, six hundred two thousand, four hundred two".