20122121002 has 4 divisors (see below), whose sum is σ = 30183181506. Its totient is φ = 10061060500.

The previous prime is 20122120937. The next prime is 20122121003. The reversal of 20122121002 is 20012122102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15747489121 + 4374631881 = 125489^2 + 66141^2 .

It is not an unprimeable number, because it can be changed into a prime (20122121003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030530249 + ... + 5030530252.

Almost surely, 2^20122121002 is an apocalyptic number.

20122121002 is a deficient number, since it is larger than the sum of its proper divisors (10061060504).

20122121002 is a wasteful number, since it uses less digits than its factorization.

20122121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10061060503.

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

Adding to 20122121002 its reverse (20012122102), we get a palindrome (40134243104).

The spelling of 20122121002 in words is "twenty billion, one hundred twenty-two million, one hundred twenty-one thousand, two".