121201220021002 has 16 divisors (see below), whose sum is σ = 199890916918272. Its totient is φ = 54657672592320.

The previous prime is 121201220020997. The next prime is 121201220021017. The reversal of 121201220021002 is 200120022102121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21689549823 + ... + 21689555410.

It is an arithmetic number, because the mean of its divisors is an integer number (12493182307392).

Almost surely, 2^{121201220021002} is an apocalyptic number.

121201220021002 is a deficient number, since it is larger than the sum of its proper divisors (78689696897270).

121201220021002 is a wasteful number, since it uses less digits than its factorization.

121201220021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43379105373.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121201220021002 its reverse (200120022102121), we get a palindrome (321321242123123).

The spelling of 121201220021002 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twenty million, twenty-one thousand, two".