121202010021 has 16 divisors (see below), whose sum is σ = 170139107840. Its totient is φ = 76534677360.

The previous prime is 121202009987. The next prime is 121202010089. The reversal of 121202010021 is 120010202121.

It is not a de Polignac number, because 121202010021 - 2¹¹ = 121202007973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121202009979 and 121202010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121202010121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125976 + ... + 508206.

It is an arithmetic number, because the mean of its divisors is an integer number (10633694240).

Almost surely, 2^121202010021 is an apocalyptic number.

It is an amenable number.

121202010021 is a deficient number, since it is larger than the sum of its proper divisors (48937097819).

121202010021 is a wasteful number, since it uses less digits than its factorization.

121202010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387816.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121202010021 its reverse (120010202121), we get a palindrome (241212212142).

The spelling of 121202010021 in words is "one hundred twenty-one billion, two hundred two million, ten thousand, twenty-one".