121220021002 has 8 divisors (see below), whose sum is σ = 181837475712. Its totient is φ = 60607529100.

The previous prime is 121220020991. The next prime is 121220021057. The reversal of 121220021002 is 200120022121.

It is a happy number.

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

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, 1179024 + ... + 1277707.

It is an arithmetic number, because the mean of its divisors is an integer number (22729684464).

Almost surely, 2^121220021002 is an apocalyptic number.

121220021002 is a deficient number, since it is larger than the sum of its proper divisors (60617454710).

121220021002 is a wasteful number, since it uses less digits than its factorization.

121220021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481404.

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

Adding to 121220021002 its reverse (200120022121), we get a palindrome (321340043123).

The spelling of 121220021002 in words is "one hundred twenty-one billion, two hundred twenty million, twenty-one thousand, two".