121022020002 has 64 divisors (see below), whose sum is σ = 269037941760. Its totient is φ = 36059943744.

The previous prime is 121022019977. The next prime is 121022020013. The reversal of 121022020002 is 200020220121.

It is a self number, because there is not a number n which added to its sum of digits gives 121022020002.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112083 + ... + 504585.

It is an arithmetic number, because the mean of its divisors is an integer number (4203717840).

Almost surely, 2^121022020002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121022020002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134518970880).

121022020002 is an abundant number, since it is smaller than the sum of its proper divisors (148015921758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121022020002 is a wasteful number, since it uses less digits than its factorization.

121022020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392647.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 121022020002 its reverse (200020220121), we get a palindrome (321042240123).

The spelling of 121022020002 in words is "one hundred twenty-one billion, twenty-two million, twenty thousand, two".