121212020221002 has 12 divisors (see below), whose sum is σ = 262626043812210. Its totient is φ = 40404006740328.

The previous prime is 121212020220979. The next prime is 121212020221007. The reversal of 121212020221002 is 200122020212121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 93779681688081 + 27432338532921 = 9683991^2 + 5237589^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 6734001123389 = 121212020221002 / (1 + 2 + 1 + 2 + 1 + 2 + 0 + 2 + 0 + 2 + 2 + 1 + 0 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (121212020221007) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3367000561677 + ... + 3367000561712.

Almost surely, 2^{121212020221002} is an apocalyptic number.

121212020221002 is an abundant number, since it is smaller than the sum of its proper divisors (141414023591208).

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

121212020221002 is a wasteful number, since it uses less digits than its factorization.

121212020221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6734001123397 (or 6734001123394 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121212020221002 its reverse (200122020212121), we get a palindrome (321334040433123).

The spelling of 121212020221002 in words is "one hundred twenty-one trillion, two hundred twelve billion, twenty million, two hundred twenty-one thousand, two".