20021121202 has 8 divisors (see below), whose sum is σ = 30369116700. Its totient is φ = 9898082304.

The previous prime is 20021121193. The next prime is 20021121217. The reversal of 20021121202 is 20212112002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18843327441 + 1177793761 = 137271^2 + 34319^2 .

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, 56238927 + ... + 56239282.

Almost surely, 2^20021121202 is an apocalyptic number.

20021121202 is a deficient number, since it is larger than the sum of its proper divisors (10347995498).

20021121202 is a wasteful number, since it uses less digits than its factorization.

20021121202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112478300.

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

Adding to 20021121202 its reverse (20212112002), we get a palindrome (40233233204).

The spelling of 20021121202 in words is "twenty billion, twenty-one million, one hundred twenty-one thousand, two hundred two".