121202021002 has 4 divisors (see below), whose sum is σ = 181803031506. Its totient is φ = 60601010500.

The previous prime is 121202020969. The next prime is 121202021009. The reversal of 121202021002 is 200120202121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 91245680761 + 29956340241 = 302069^2 + 173079^2 .

It is not an unprimeable number, because it can be changed into a prime (121202021009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30300505249 + ... + 30300505252.

Almost surely, 2^121202021002 is an apocalyptic number.

121202021002 is a deficient number, since it is larger than the sum of its proper divisors (60601010504).

121202021002 is an equidigital number, since it uses as much as digits as its factorization.

121202021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60601010503.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 121202021002 its reverse (200120202121), we get a palindrome (321322223123).

The spelling of 121202021002 in words is "one hundred twenty-one billion, two hundred two million, twenty-one thousand, two".